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Brian Boru (; modern ; 23 April 1014) was the
High King of Ireland High King of Ireland ( ) was a royal title in Gaelic Ireland held by those who had, or who are claimed to have had, lordship over all of Ireland. The title was held by historical kings and was later sometimes assigned anachronously or to leg ...
from 1002 to 1014. He ended the domination of the High Kingship of Ireland by the
Uí Néill The Uí Néill (; meaning "descendants of Niall") are Irish dynasties that claim descent from Niall Noígíallach (Niall of the Nine Hostages), a historical King of Tara who is believed to have died around c. 405. They are generally divided ...
, and is likely responsible for ending
Viking Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...
invasions of Ireland. Brian Boru is mentioned in the
Annals of Inisfallen The ''Annals of Inisfallen'' () are a chronicle of the medieval history of Ireland. Overview There are more than 2,500 entries spanning the years between 433 and 1450. The manuscript is thought to have been compiled in 1092, as the chronic ...
and in
Chronicon Scotorum ''Chronicon Scotorum'', also known as ''Chronicum Scotorum'', is a medieval Irish chronicle. Overview According to Nollaig Ó Muraíle, it is "a collection of annals belonging to the ' Clonmacnoise group', covering the period from prehistoric ...
as "Brian mac Cennétig" (Brian, son of Cennétig). The name ''Brian of Bóruma'' or ''Brian Boru'' was given to him posthumously. Brian built on the achievements of his father, Cennétig mac Lorcain, and especially his elder brother, Mathgamain. Brian first made himself
king of Munster The kings of Munster () ruled the Kingdom of Munster in Ireland from its establishment during the Irish Iron Age until the High Middle Ages. According to Gaelic traditional history, laid out in works such as the ''Book of Invasions'', the earli ...
, then subjugated
Leinster Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland. The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
, eventually becoming High King of
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
. He was the founder of the
O'Brien dynasty The O'Brien dynasty (; ; genitive ''Uí Bhriain'' ) was an Irish Clan and noble house of Munster, founded in the 10th century by Brian Boru of the Dál gCais (Dalcassians). After becoming King of Munster, through conquest he established hims ...
, and is widely regarded as one of the most successful and unifying monarchs in medieval Ireland. With a population of under 500,000 people, Ireland had over 150 kings, with greater or lesser domains. The Uí Néill king Máel Sechnaill mac Domnaill, abandoned by his northern kinsmen of the
Cenél nEógain Cenél is a surname. Notable people with the surname include: *Cenél Conaill, the name of the "kindred" or descendants of Conall Gulban, son of Niall Noígiallach defined by oral and recorded history * Cenél nEógain (in English, Cenel Eogan) is ...
and
Cenél Conaill Cenél is a surname. Notable people with the surname include: *Cenél Conaill, the name of the "kindred" or descendants of Conall Gulban, son of Niall Noígiallach defined by oral and recorded history *Cenél nEógain (in English, Cenel Eogan) is ...
, acknowledged Brian as High King at
Athlone Athlone (; ) is a town on the border of County Roscommon and County Westmeath, Republic of Ireland, Ireland. It is located on the River Shannon near the southern shore of Lough Ree. It is the second most populous town in the Midland Region, Ir ...
in 1002. In the decade that followed, Brian campaigned against the northern Uí Néill, who refused to accept his claims; against Leinster, where resistance was frequent; and against the Norse-Gaelic
Kingdom of Dublin The Kingdom of Dublin (Old Norse: ''Dyflin'') was a Norse kingdom in Ireland that lasted from roughly 853 AD to 1170 AD. It was the first and longest-lasting Norse kingdom in Ireland, founded by Vikings who invaded the territory around Dublin ...
. Brian was described in the ''
Annals of Ulster The ''Annals of Ulster'' () are annals of History of Ireland, medieval Ireland. The entries span the years from 431 AD to 1540 AD. The entries up to 1489 AD were compiled in the late 15th century by the scribe Ruaidhrí Ó Luin� ...
'' as ''ardrí Gaidhel Erenn & Gall & Bretan, August iartair tuaiscirt Eorpa uile'' (High King of the
Gaels The Gaels ( ; ; ; ) are an Insular Celts, Insular Celtic ethnolinguistic group native to Ireland, Scotland, and the Isle of Man. They are associated with the Goidelic languages, Gaelic languages: a branch of the Celtic languages comprising ...
of Ireland and the Norse foreigners and the Britons, ''
Augustus Gaius Julius Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian (), was the founder of the Roman Empire, who reigned as the first Roman emperor from 27 BC until his death in A ...
'' of all north-western Europe), the only Irish king to receive that distinction in the annals. Brian's hard-won authority was seriously challenged in 1013 when his ally Máel Sechnaill was attacked by the Cenél nEógain king Flaithbertach Ua Néill, with the
Ulster Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
men as his allies. This was followed by further attacks on Máel Sechnaill by the Germanic Norsemen of Dublin under their Norse king Sigtrygg Silkbeard and the Leinstermen led by Máel Mórda mac Murchada. Brian campaigned against these enemies in 1013. In 1014, his armies confronted the armies of Leinster and Dublin. In the resulting
Battle of Clontarf The Battle of Clontarf () took place on 23 April 1014 at Clontarf, near Dublin, on the east coast of Ireland. It pitted an army led by Brian Boru, High King of Ireland, against a Norse- Irish alliance comprising the forces of Sigtrygg Silkbea ...
Brian was killed; nonetheless, his army was victorious against the Leinstermen and Norsemen. The battle is widely lauded as a pivotal moment in Irish history, and is well known in popular memory. Brian was well regarded by contemporary chroniclers. The Norse-Gaels and Scandinavians also produced works mentioning Brian, including '' Njal's Saga'', the ''
Orkneyinga Saga The ''Orkneyinga saga'' (Old Norse: ; ; also called the ''History of the Earls of Orkney'' and ''Jarls' Saga'') is a narrative of the history of the Orkney and Shetland islands and their relationship with other local polities, particularly No ...
'', and the now-lost '' Brian's Saga''. Brian's war against Máel Mórda and Sigtrygg was to be inextricably connected with his complicated marital relations, in particular his marriage to Gormlaith, Máel Mórda's sister and Sigtrygg's mother, who had been in turn the wife of Amlaíb Cuarán, king of Dublin and
York York is a cathedral city in North Yorkshire, England, with Roman Britain, Roman origins, sited at the confluence of the rivers River Ouse, Yorkshire, Ouse and River Foss, Foss. It has many historic buildings and other structures, such as a Yor ...
, then of Máel Sechnaill, and finally of Brian himself.


Family background

Brian Boru was one of the twelve sons of Cennétig mac Lorcáin (d. 951), who was King of
Dál gCais The Dalcassians ( ) are a Gaels, Gaelic Irish clan, generally accepted by contemporary scholarship as being a branch of the Déisi Muman, that became very powerful in Ireland during the 10th century. Their genealogies claimed descent from Tál ...
and king of Tuadmumu ( Thomond), modern
County Clare County Clare () is a Counties of Ireland, county in the Provinces of Ireland, province of Munster in the Southern Region, Ireland, Southern part of Republic of Ireland, Ireland, bordered on the west by the Atlantic Ocean. Clare County Council ...
, then a sub-kingdom in the north of
Munster Munster ( or ) is the largest of the four provinces of Ireland, located in the south west of the island. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings" (). Following the Nor ...
. Cennétig was described as ''rígdamna Caisil'', meaning that he was either heir or candidate ("king material") to the kingship of
Cashel Cashel (an Anglicised form of the Irish language word ''Caiseal'', meaning "stone fort") may refer to: Places in Ireland *Cashel, County Tipperary **The Rock of Cashel, an ancient, hilltop fortress complex for which Cashel is named ** Archbishop ...
or Munster,Duffy, "Brian Bóruma" although this might be a later interpolation. Brian's mother was Bé Binn inion Urchadh, daughter of Urchadh mac Murchadh (d. 945), king of Maigh Seóla in west Connacht.Jaski, "Brian Boru", p. 45. That they belonged to the Uí Briúin Seóla may explain why he received the name Brian, which was rare among the Dál gCais. Brian's family were descended from the Ui Tairdelbach branch of the Dal gCais (or Deis Tuisceart). This branch had recently taken power from the Ui Óengusso branch which had traditionally supplied the kings of the Dal gCais (also known as the Deisi Tuaiscirt). The Uí Toirdhealbhach had extended their influence over Thomond and in 925 the annals note that Ánrothán son of Máel Gorm assumed the kingship of Corco Mruad. In 934 Reabachán mac Mothla died and was named as "King of the Dál gCais" in the Annals (the earliest usage of this term). The same year of his death, his son Dub Gilla was killed by Brian's uncle Conghalach and Brian's grandfather Lorcáin is said to have succeeded to the kingship. He enjoyed a short reign before being succeeded by his own son Cinnéidigh who was the first King of Dál gCais to lead an army outside his own territory and lead an expedition as far north as
Athlone Athlone (; ) is a town on the border of County Roscommon and County Westmeath, Republic of Ireland, Ireland. It is located on the River Shannon near the southern shore of Lough Ree. It is the second most populous town in the Midland Region, Ir ...
. By his death in 951, he had been acknowledged as " King of Tuadmumu". His brother, Mathgamain, built on these achievements and was the first to capture
Cashel Cashel (an Anglicised form of the Irish language word ''Caiseal'', meaning "stone fort") may refer to: Places in Ireland *Cashel, County Tipperary **The Rock of Cashel, an ancient, hilltop fortress complex for which Cashel is named ** Archbishop ...
and become
King of Munster The kings of Munster () ruled the Kingdom of Munster in Ireland from its establishment during the Irish Iron Age until the High Middle Ages. According to Gaelic traditional history, laid out in works such as the ''Book of Invasions'', the earli ...
.


Early life

Brian was born at Kincora, his father's residence or fort in Killaloe, a town in the region of Tuadmumu. Brian's posthumous cognomen "Bóruma" (anglicised as Boru) may have referred to " Béal Bóruma", a fort north of Killaloe, where the Dál gCais held sway. Another explanation, though possibly a late (re-)interpretation, is that the nickname represented Old Irish ''bóruma'' "of the cattle tribute", referring to his capacity as a powerful overlord. As the youngest of twelve brothers, Brian was highly unlikely to be heir to his father's throne. When he was young, he was sent to a
monastery A monastery is a building or complex of buildings comprising the domestic quarters and workplaces of Monasticism, monastics, monks or nuns, whether living in Cenobitic monasticism, communities or alone (hermits). A monastery generally includes a ...
to study
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
and the history of Ireland. He was taught at the monastery on the island of Innisfallen, near modern
Killarney Killarney ( ; , meaning 'church of sloes') is a town in County Kerry, southwestern Republic of Ireland, Ireland. The town is on the northeastern shore of Lough Leane, part of Killarney National Park, and is home to St Mary's Cathedral, Killar ...
in
County Kerry County Kerry () is a Counties of Ireland, county on the southwest coast of Republic of Ireland, Ireland, within the Provinces of Ireland, province of Munster and the Southern Region, Ireland, Southern Region. It is bordered by two other countie ...
. His teacher or mentor was the noted monk, Maelsuthain Ua Cearbhaill, an Eóganacht chief who had become the head of the monastery, noted for starting the
Annals of Inisfallen The ''Annals of Inisfallen'' () are a chronicle of the medieval history of Ireland. Overview There are more than 2,500 entries spanning the years between 433 and 1450. The manuscript is thought to have been compiled in 1092, as the chronic ...
. Ua Cearbhaill would later become Brian's ''anmchara'' (advisor). However, when Brian was ten years old, he received news that his father had been killed in battle with the Vikings of
Limerick Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
, and he was brought home.Clare County Libraries According to a biography of Brian, he once witnessed a raid on a Dal gCáis fort by the Vikings of Limerick. The fort was located on the banks of the
River Shannon The River Shannon ( or archaic ') is the major river on the island of Ireland, and at in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of , – approximately one fifth of the area of I ...
, allowing the Vikings to sail up the river from
Limerick Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
to attack it. According to the story, Brian, Mathgamain, and another older brother were on a hill or high ground near the fort tending to a herd of cattle. While they were there, they saw the raid from the mountainside after hearing screams and seeing smoke in the sky. They rushed down to the town, only to find the Vikings had already left. The settlement was burnt and looted. Brian's mother was killed, as were several of Brian's brothers who were defending the town, along with many of the townspeople. This event horrified Brian and had a lasting impact on him. The
River Shannon The River Shannon ( or archaic ') is the major river on the island of Ireland, and at in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of , – approximately one fifth of the area of I ...
served as an easy route by which raids could be made against the provinces of
Connacht Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
and Meath. Both Brian's father, Cennétig mac Lorcáin, and his older brother Mathgamain had conducted river-borne raids, in which the young Brian would undoubtedly have participated. This may have been the root of his appreciation for
naval forces A navy, naval force, military maritime fleet, war navy, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operati ...
in his later career. When their father died, the kingship of Tuadmumu passed to Brian's older brother, Mathgamain. Brian and Mathgamain campaigned together throughout Munster.McCullough (2002), p. 106 When Mathgamain was killed in 976. Brian replaced him. Subsequently, he became king of the entire kingdom of Munster.


Reign of Mathgamain

In 964, Brian's older brother, Mathgamain, claimed control over the entire province of Munster by capturing the
Rock of Cashel The Rock of Cashel ( ), also known as Cashel of the Kings and St. Patrick's Rock, is a historical site located dramatically above a plain at Cashel, County Tipperary, Cashel, County Tipperary, Republic of Ireland, Ireland. History According t ...
, capital of the ancient
Eóganachta The Eóganachta (Modern , ) were an Irish dynasty centred on Rock of Cashel, Cashel which dominated southern Ireland (namely the Kingdom of Munster) from the 6/7th to the 10th centuries, and following that, in a restricted form, the Kingdom of De ...
, the hereditary overlords or High Kings of Munster, but who in dynastic strife and with multiple assassinations had weakened themselves to the point they were now impotent. Earlier attacks from both the
Uí Néill The Uí Néill (; meaning "descendants of Niall") are Irish dynasties that claim descent from Niall Noígíallach (Niall of the Nine Hostages), a historical King of Tara who is believed to have died around c. 405. They are generally divided ...
and Vikings were also factors. This situation allowed the illegitimate (from the Eóganacht perspective) but militarized Dál Cais to attempt to seize the provincial kingship. Mathgamain was never fully recognized and was opposed throughout his career in the 960s and 970s by Máel Muad mac Brain, a semi-outsider from the Cashel perspective but still a legitimate Eóganacht claimant from far south Munster. In addition to Máel Muad, the Norse king Ivar of Limerick was a threat and may have been attempting to establish some overlordship in the province or a region of it himself, with the '' Cogad Gaedel re Gallaib'' even asserting he actually achieved this until routed by Mathgamain and Brian in the celebrated Battle of Sulcoit in 968. Initially, Mathgamain had made peace with the Norse of Limerick. However, Brian was eager to avenge the deaths of his family members at the hands of the Vikings, and deserted with a band of his followers and launched a guerilla campaign against the Vikings from the mountains of Munster. They attacked Viking forts and patrols and survived with whatever food and weapons they found. Their attacks were successful in weakening the Vikings, but casualties began to mount and according to writings by Brian's scribe, just 15 men remained. However, at this point Mathgamain, inspired by the courage of his younger brother, decided to attack the Vikings with Brian and drive them from Limerick and Munster once and for all. They gathered an army of kings from all over Munster, including their former enemy Maél Muad. They ambushed and routed the Norse at the Battle of Sulcoit. They followed up their victory by looting and burning Limerick. They killed every man of fighting age and enslaved the rest of the population. This was the first of three battles which highlighted Brian's career. This victory was not decisive and eventually there grew up a brief alliance of sorts between Mathgamain, Máel Muad and others to drive the Norse "soldiers" or "officials" out of Munster and destroy their Limerick fortress in 972. The two Gaelic claimants were soon back to fighting and the fortuitous capture of Mathgamain in 976 by Donnubán mac Cathail allowed him to be effortlessly dispatched or murdered by Máel Muad, who would now rule as king of Cashel for two years.


Early reign in Munster

Despite the death of Mathgamain, the Dál gCais remained a powerful force. Mathgamain was succeeded as King of Thomond by Brian, who quickly proved to be as fine a commander of armies as his brother was. After attacking and killing the much-weakened Ivar in the year 977, Brian pursued a new target, intending to eradicate the remaining Viking presence in Munster. Upon ascending to the throne, Imar, ruler or governor of the city of Limerick who was loyal to the now-slain Ivar, fled the city by ship down the River Shannon towards the Shannon estuary and took refuge in a monastery on Inis Cathaigh (Scattery Island), accompanied by his sons. However, in an act of revenge for the death of his brother, Brian set aside the sacred traditions and attacked the island with his troops, slaughtered the Vikings and desecrated the church. Around the same time, in 978, Brian challenged Máel Muad to battle, and defeated him in the fateful Battle of Belach Lechta. Máel Muad was killed in the battle and afterwards the Eóganachta were no longer viable for the provincial Kingship, which was based upon lineage. Therefore, the Kingship of Munster passed to the Dál gCais, and Brian became king. Afterwards, the last opposition remaining in Munster was an alliance consisting of the rebellious Irish led by Donnubán (Donovan), the man responsible for Mathgamain's death, and the remaining Norse/Viking forces, possibly led by Ivar's last remaining son and designated successor, Aralt (Harold). Brian attacked them at the Battle of Cathair Cuan, which may have been either a single battle or an extended conflict over the period 977–978. In any case, the event is mentioned in the Annals, and the later source the ''Cogadh'' describes Brian making a "great slaughter" of his enemies, killing both Donnubán and Aralt, and securing his position within the province. However, he did allow some of the Norse to remain in their settlement, as they were wealthy and now central to trade in the region, particularly the slave trade, and possessed a fleet of great value, which Brian would utilise in his later naval expeditions.
Cian In Irish mythology, Cian or Cían (), nicknamed Scal Balb, was the son of Dian Cecht, the physician of the Tuatha Dé Danann, and best known as the father of Lugh Lamhfada. Cían's brothers were Cu, Cethen, and Miach. Cían was slain by th ...
, the son of his brother Mathgamain's sworn enemy Máel Muad, later became a loyal ally of Brian and served under him in a number of campaigns. According to some accounts, Cian would later marry one of Brian's daughters, Sadbh (died 1048).


Clashes with the High King

Having established unchallenged rule over his home Province of Munster, Brian turned to extending his authority over the neighboring provinces of
Leinster Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland. The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
to the east and Connacht to the north-west. By doing so, he came into conflict with High King Máel Sechnaill mac Domnaill whose power base was the Province of Meath. For the next fifteen years, from 982 to 997, High King Máel Sechnaill repeatedly led armies into Leinster and Munster, while Brian, like his father and brother before him, led his naval forces of around three hundred ships up the Shannon to attack Connacht and Meath on either side of the river. He suffered quite a few reverses in this struggle, but appears to have learned from his setbacks. He developed a military strategy that would serve him well throughout his career: the coordinated use of forces on both land and water, including on rivers and along Ireland's coast. Brian's naval forces, which included contingents supplied by the Hiberno-Norse cities that he brought under his control (particularly
Waterford Waterford ( ) is a City status in Ireland, city in County Waterford in the South-East Region, Ireland, south-east of Ireland. It is located within the Provinces of Ireland, province of Munster. The city is situated at the head of Waterford H ...
), provided both indirect and direct support for his forces on land. Indirect support involved a fleet making a diversionary attack on an enemy in a location far away from where Brian planned to strike with his army. Direct support involved
naval forces A navy, naval force, military maritime fleet, war navy, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operati ...
acting as one arm in a strategic pincer, the army forming the other arm. The conflict began in 982, when Brian was campaigning against the
kingdom of Osraige Osraige (Old Irish) or Osraighe (Classical Irish), Osraí (Modern Irish), anglicized as Ossory, was a medieval Irish kingdom comprising what is now County Kilkenny and western County Laois, corresponding to the Roman Catholic Diocese of Ossory, ...
. With Munster undefended, Maél Sechnaill attacked the Dál gCáis, destroying the sacred tree of Adair, under which many of the chiefs of the Dál gCáis had been crowned, including Brian's father Cénnetig, his brother Mathgamain and Brian himself. In response, Brian led an army into
Westmeath County Westmeath (; or simply ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Leinster and is part of the Eastern and Midland Region. It formed part of the historic Kingdom of ...
where he plundered the land. Brian's fleet did suffer a setback when a squadron of his fleet attacked
Connacht Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
, where they killed a prince of Connacht, Muirgius, who was among the defenders. In retaliation, the Connachtmen attacked the ships, massacring the crews. Mael Sechnaill launched a counter-offensive into Munster and in the ensuing battle he defeated the Dál gCáis, killing around six hundred men, including Brian's uncle. There was a period of relative peace between the two afterwards for about nine years, with Brian continuing to campaign elsewhere as he attempted to expand his power in the south and east. Then in 993, Brian, now in control of much of Munster and gaining ground in Leinster, and unable to make significant progress against the High King on land, decided to utilise his naval superiority to attack Mael Sechnaill. His fleet sailed up the Shannon and invaded the Kingdom of Breifne, in what is now counties Leitrim and
Cavan Cavan ( ; ) is the county town of County Cavan in Republic of Ireland, Ireland. The town lies in Ulster, near the border with County Fermanagh in Northern Ireland. The town is bypassed by the main N3 road (Ireland), N3 road that links Dublin ( ...
. In doing this, he put pressure on the High King as he was now open to attack from both north and south. In 996, Brian finally managed to control the province of
Leinster Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland. The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
, which may have been what led Máel Sechnaill to reach a compromise with him in the following year. The two kings met at Bleanphottogue, on the banks of
Lough Ree Lough Ree (), translated to English as ''King's Lake'' or ''King Lake'', is a lake in the midlands of Republic of Ireland, Ireland, the second of the three major lakes on the River Shannon. Lough Ree is the second largest lake on the Shannon af ...
in
County Fermanagh County Fermanagh ( ; ) is one of the thirty-two counties of Ireland, one of the nine counties of Ulster and one of six counties of Northern Ireland. The county covers an area of and had a population of 63,585 as of 2021. Enniskillen is the ...
, where the agreement was made. By recognising Brian's authority over '' Leth Moga,'' that is, the Southern Half, which included the provinces of Munster and Leinster (and the Hiberno-Norse cities within them), Máel Sechnaill was simply accepting the reality that confronted him and retained control over '' Leth Cuinn'', that is, the Northern Half, which consisted of the provinces of Meath,
Connacht Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
, and
Ulster Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
. Precisely because he had submitted to Brian's authority, the king of Leinster was overthrown in 998 and replaced by Máel Mórda mac Murchada. Given the circumstances under which Máel Mórda had been appointed, it is not surprising that he launched an open rebellion against Brian's authority. With Leinster in rebellion, the kingdoms of both Brian and Mael Sechnaill were threatened, and thus they decided to briefly sideline their own conflict to defeat Leinster. Brian assembled the forces of the province of Munster and Mael Sechnaill assembled those of Meath, with the intention of laying siege to the Hiberno-Norse city of Dublin, which was ruled by Máel Mórda's ally and cousin, Sigtrygg Silkbeard. Together Máel Mórda and Sigtrygg determined to meet Brian's army in battle rather than risk a
siege A siege () . is a military blockade of a city, or fortress, with the intent of conquering by attrition, or by well-prepared assault. Siege warfare (also called siegecrafts or poliorcetics) is a form of constant, low-intensity conflict charact ...
. Thus, in 999, the opposing armies fought the Battle of Glenmama. The
Irish annals A number of Irish annals, of which the earliest was the Chronicle of Ireland, were compiled up to and shortly after the end of the 17th century. Annals were originally a means by which monks determined the yearly chronology of feast days. Over ti ...
all agree that this was a particularly fierce and bloody engagement, although claims that it lasted from morning until midnight, or that the combined Leinster-Dublin force lost 4,000 killed are open to question. In any case, Brian followed up his victory, as he and his brother had in the aftermath of the Battle of Sulcoit thirty-two years before, by capturing and sacking the enemy's city. Sigtrygg fled the city, seeking support from kings in Ulster, but he was turned away by the Ulaid, leaving Sigtrygg few options but to return to Dublin and submit to Brian. Once again, Brian opted for reconciliation; he requested that Sigtrygg return and resume his position as ruler of Dublin, giving Sigtrygg the hand of one of his daughters in marriage, just as he had with the Eoganacht king, Cian. It may have been on this occasion that Brian married Sigtrygg's mother and Máel Mórda's sister
Gormflaith (; ) is an Irish-language feminine given name meaning "blue princess" or "illustrious princess". is also a Irish mythology, Gaelic mythological national personification, personification of Ireland. The word ' is a compound of the Irish words ' ( ...
, the former wife of Máel Sechnaill.


Struggle for Ireland

Brian made it clear that his ambitions had not been satisfied by the compromise of 997 when, in the year 1000, he led a combined Munster-Leinster-Dublin army in an attack on High King Máel Sechnaill mac Domnaill's home province of Meath. The struggle over who would control all of Ireland was renewed. Máel Sechnaill's most important ally was the
king of Connacht The Kings of Connacht were rulers of the ''cóiced'' (variously translated as portion, fifth, province) of Connacht, which lies west of the River Shannon, Ireland. However, the name only became applied to it in the early medieval era, being named ...
, Cathal mac Conchobar mac Taidg, but this presented a number of problems. The provinces of Meath and Connacht were separated by the Shannon River, which served as both a route by which Brian's naval forces could attack the shores of either province and as a barrier to the two rulers providing mutual support for each other. Máel Sechnaill came up with an ingenious solution; two bridges would be erected across the Shannon. These bridges would serve as both obstacles preventing Brian's fleet from traveling up the Shannon and a means by which the armies of the provinces of Meath and Connacht could cross over into each other's kingdoms. The Annals state that, in the year 1002, Máel Sechnaill surrendered his title to Brian, although they do not say anything about how or why this came about. The '' Cogadh Gaedhil re Gallaibh'' provides a story in which Brian challenges High King Máel Sechnaill to a battle at the
Hill of Tara The Hill of Tara ( or ) is a hill and ancient ceremonial and burial site near Skryne in County Meath, Ireland. Tradition identifies the hill as the inauguration place and seat of the High Kings of Ireland; it also appears in Irish mythology. ...
in the province of Meath, but the High King requests a month-long truce so that he can mobilise his forces, which Brian grants him. Máel Sechnaill fails to rally the regional rulers who are nominally his subordinates by the time the deadline arrives, and he is forced to surrender his title to Brian. There have been some doubts expressed about this explanation, given Brian's style of engaging in war; if he had found his opponent at a disadvantage it is most likely he would have taken full advantage of it rather than allowing his enemy the time to even the odds. Also, given the length and intensity of the struggle between Máel Sechnaill and Brian, it seems unlikely that the High King would surrender his title without a fight. In any case, it is generally accepted that in 1002 Brian became the new High King of Ireland.


High kingship

Brian, then in his 60s, spent the next decade or so of his life subjugating and accepting the submissions of the last of the lesser kingdoms and regions which had not already submitted to him. Those campaigns included two full circuits of the island in 1005 and 1006, demonstrating his determination and energy despite his age. Unlike some who had previously held the title, Brian intended to be High King in more than name. To accomplish that, he needed to impose his will upon the regional rulers of the only province that did not already recognise his authority,
Ulster Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
. The kingdoms of the
northern Uí Néill The Northern Uí Néill was any of several dynasties in north-western medieval Ireland that claimed descent from a common ancestor, Niall of the Nine Hostages. Other dynasties in central and eastern Ireland who also claimed descent from Niall ar ...
and
Ulaid (Old Irish, ) or (Irish language, Modern Irish, ) was a Gaelic Ireland, Gaelic Provinces of Ireland, over-kingdom in north-eastern Ireland during the Middle Ages made up of a confederation of dynastic groups. Alternative names include , which ...
were some of the most powerful in Ireland, and it took Brian considerable time and resources to subdue them.


Ulster campaigns

Ulster's geography presented a formidable challenge. There were three main routes by which an invading army could enter the province, and all three favoured the defenders. Brian first had to find a means of getting through or around these defensive
choke point In military strategy, a choke point (or chokepoint), or sometimes bottleneck, is a geographical feature on land such as a valley, defile or bridge, or maritime passage through a critical waterway such as a strait, which an armed force is for ...
s and then he had to subdue the fiercely independent regional kings of Ulster. It took Brian ten years of campaigning to achieve his goal, which, considering that he could and did call on all of the military forces of the rest of Ireland, indicates how formidable the kings of Ulster were. Brian received naval support throughout his northern campaigns from Sigtrygg Silkbeard of Dublin. Silkbeard was eager to enact revenge against the Ulaid for when they refused to assist him after he was forced out of his
kingdom of Dublin The Kingdom of Dublin (Old Norse: ''Dyflin'') was a Norse kingdom in Ireland that lasted from roughly 853 AD to 1170 AD. It was the first and longest-lasting Norse kingdom in Ireland, founded by Vikings who invaded the territory around Dublin ...
by Brian following the Battle of Glenmama in 999, forcing Silkbeard to return to Dublin and submit to him. Brian was also greatly helped by the fact that two years before his first campaign in Ulster, in the year 1003, the brutal battle of Craeb Telcha had taken place between the Northern Uí Néill and the Ulaid, in which the king of the Cenél Eoghain and of the Uí Neill was killed and most of the Ulaid royal bloodline was wiped out, with the Uí Néill gaining victory. This then led to a bloody
war of succession A war of succession is a war prompted by a succession crisis in which two or more individuals claim to be the Order of succession, rightful successor to a demise of the Crown, deceased or deposition (politics), deposed monarch. The rivals are ...
within and between the clans of the Ulaid, and together with further attacks from the Uí Néill, which led to the kingdom's being severely weakened. Brian accepted the submission of the Cenel Eoghain king in 1005 and later accepted the submission of many of the Ulaid clans at a sacred Ulaid site, Emain Macha. However Flaithbertaigh Ua Néill, the new king of the Northern Uí Néill and of the Cenél Eoghan, although having already submitted to Brian, was apparently unwilling to accept fully the High King's authority, and was quite rebellious. He was known for his continued aggression towards his neighbours despite previously accepting Brian's rule. In 1005, after Brian had departed Ulster, he attempted to exert his overlordship over the Ulaid, and seemingly wanted to punish them for submitting to Brian, to which the Northern Uí Néill were vehemently opposed. He attacked the kingdom, killing several kings and princes of the Ulaid. He also took several hostages. This caused Brian to return in 1006 and again in 1007 to deal with Flaithbertach. On the latter occasion, he removed the hostages of the Ulaid from Flaithbertach's custody and took them into his own custody (according to the
Annals of Inisfallen The ''Annals of Inisfallen'' () are a chronicle of the medieval history of Ireland. Overview There are more than 2,500 entries spanning the years between 433 and 1450. The manuscript is thought to have been compiled in 1092, as the chronic ...
, Brian had to take the hostages forcefully). Flaithbertaigh again submitted, and also married one of Brian's daughters, Bé Binn. Despite this, Brian continued to be troubled by the rebellious Flaithbertaigh. In the year 1009, Flaithbertaigh blinded and then executed the king of the Cenél Chonaill. Later that year he would also launch raids in the
Midlands The Midlands is the central region of England, to the south of Northern England, to the north of southern England, to the east of Wales, and to the west of the North Sea. The Midlands comprises the ceremonial counties of Derbyshire, Herefor ...
going as far south as the
River Boyne The River Boyne ( or ''Abhainn na Bóinne'') is a river in Leinster, Ireland, the course of which is about long. It rises at Trinity Well, Newberry Hall, near Carbury, County Kildare, and flows north-east through County Meath to reach the ...
. This led to Brian's return to Ulster yet again, this time taking hostages from the Cenél Eoghain back to his home province, finally gaining the proper submission of Flaithbertaigh. Flaithbertaigh would then take part in campaigns against the Cenél Chonaill, the final kingdom yet to submit to Brian, in the year 1011 alongside Brian's sons Murchad and Domnall. However, they were unsuccessful in gaining the submission of the Cenél Chonaill. Brian then personally proceeded to lead a second invasion later that year, this time successfully subjugating and receiving the submission of the Cenél Chonaill. While Flaithbertaigh would continue attacking the Ulaid and Cenél Chonaill in late 1011 and in 1012, for the time he was no longer of any threat to Brian. Throughout his campaigns in the province, it was once again Brian's coordinated use of forces on land and at sea that allowed him to triumph; while the rulers of Ulster could bring the advance of Brian's army to a halt, they could not prevent his fleet from attacking the shores of their kingdoms. Once Brian entered the province of Ulster, he systematically defeated each of the regional rulers who defied him, forcing them to recognise him as their overlord. It was during this process that Brian pursued an alternative means of consolidating his control, not merely over the province of Ulster, but over Ireland as a whole. In contrast to its structure elsewhere, the Church in Ireland was not centred around
diocese In Ecclesiastical polity, church governance, a diocese or bishopric is the ecclesiastical district under the jurisdiction of a bishop. History In the later organization of the Roman Empire, the increasingly subdivided Roman province, prov ...
s and
archdiocese In church governance, a diocese or bishopric is the ecclesiastical district under the jurisdiction of a bishop. History In the later organization of the Roman Empire, the increasingly subdivided provinces were administratively associated ...
s, but rather around
monasteries A monastery is a building or complex of buildings comprising the domestic quarters and workplaces of monastics, monks or nuns, whether living in communities or alone ( hermits). A monastery generally includes a place reserved for prayer which m ...
headed by powerful abbots who were members of the royal dynasties of the lands in which their monasteries resided. Among the most important monasteries was
Armagh Armagh ( ; , , " Macha's height") is a city and the county town of County Armagh, in Northern Ireland, as well as a civil parish. It is the ecclesiastical capital of Ireland – the seat of the Archbishops of Armagh, the Primates of All ...
, located in the province of Ulster. Brian's advisor, Maelsuthain O'Carroll, documented in the ''
Book of Armagh The ''Book of Armagh'' or Codex Ardmachanus (ar or 61) (), also known as the ''Canon of Patrick'' and the ''Liber Ar(d)machanus'', is a 9th-century Irish art, Irish illuminated manuscript written mainly in Latin. It is held by the Library of Tri ...
'' that, in the year 1005, Brian donated 22 ounces of gold to this monastery and declared that Armagh was the religious capital of Ireland, to which all other monasteries should send the funds they collected. This was a clever move, for the supremacy of the monastery of Armagh would last only so long as Brian remained the High King. Therefore, it was in the interest of Armagh to support Brian with all their wealth and power. Brian is not referred to in the passage from the ''
Book of Armagh The ''Book of Armagh'' or Codex Ardmachanus (ar or 61) (), also known as the ''Canon of Patrick'' and the ''Liber Ar(d)machanus'', is a 9th-century Irish art, Irish illuminated manuscript written mainly in Latin. It is held by the Library of Tri ...
'' as the —that is, High King—but rather he is declared , 'Emperor of the Gaels'. Though it is only speculation, it has been suggested that Brian and the Church in Ireland were together seeking to establish a new form of kingship in Ireland, one that was modelled after the kingships of England and France, in which there were no lesser ranks of regional kings—simply one king who had (or sought to have) power over all others in a
unitary state A unitary state is a (Sovereign state, sovereign) State (polity), state governed as a single entity in which the central government is the supreme authority. The central government may create or abolish administrative divisions (sub-national or ...
. In any case, whether as high king or emperor, by 1011 all of the regional rulers in Ireland acknowledged Brian's authority. No sooner had Brian achieved this before it was lost again.


Rebellion in Leinster

Máel Mórda mac Murchada of
Leinster Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland. The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
had only accepted Brian's authority grudgingly, and in 1012 he rose in rebellion. The '' Cogadh Gaedhil re Gallaibh'' relates a story in which one of Brian's sons insults Máel Mórda, which leads him to declare his independence from Brian's authority and attack his neighbours. Another possible reason was that the kings of Leinster and Dublin believed Maél Sechnaill was weak and that the Kingdom of Meath was vulnerable. This was because Flaithbertaigh Uí Néill, king of the Cenél Eoghain and the northern Uí Néill, was again becoming troublesome for Brian. In 1013, he raided the
Midlands The Midlands is the central region of England, to the south of Northern England, to the north of southern England, to the east of Wales, and to the west of the North Sea. The Midlands comprises the ceremonial counties of Derbyshire, Herefor ...
, bringing him into direct conflict with Maél Sechnaill who was the
king of Meath In medieval Ireland, the kings of Mide were of the Clann Cholmáin, a branch of the Uí Néill. Several were High Kings of Ireland. After the collapse of the kingdom in the 12th century its dynasty, the Ua Mael Sechlainn or Ó Melaghlins, wer ...
. The two armies had a stand-off near Kells, but Maél Sechnaill retreated for unknown reasons before any battle could occur. This led to the belief in Leinster that Meath was vulnerable, which would also weaken Brian if Leinster could knock one of his allies out of any conflict. Whatever the actual reason was, Máel Mórda sought allies with which to defy the High King. He found one in Flaithbertach Uí Neill in Ulster who had only recently submitted to Brian. Together, they attacked the province of Meath (again), where the former High King Máel Sechnaill sought Brian's help to defend his kingdom. In 1013, Brian led a force from his own province of Munster and from southern Connacht into Leinster, and a detachment under his son, Murchad, ravaged the southern half of the province of Leinster for three months. The forces under Murchad and Brian were reunited on 9 September outside the walls of Dublin. The city was
blockade A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force. A blockade differs from an embargo or sanction, which are ...
d by Brian's fleet, but it was the High King's army that ran out of supplies first, so that Brian was forced to abandon the siege and return to Munster around
Christmas Christmas is an annual festival commemorating Nativity of Jesus, the birth of Jesus Christ, observed primarily on December 25 as a Religion, religious and Culture, cultural celebration among billions of people Observance of Christmas by coun ...
.


Battle of Clontarf

Máel Mórda was aware that the High King would return to Dublin in 1014 to try once more to defeat him. He may have hoped that by defying Brian, he could enlist the aid of all the other regional rulers. If so, he was sorely disappointed. The province of
Connacht Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
and most of the province of
Ulster Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
failed to support either side of the conflict, with the exception of Flaithbertach Ua Néill of the northern Uí Néill who sent troops to Máel Mórda. His inability to obtain troops from any rulers in Ireland may explain why Máel Mórda sought support from rulers outside Ireland, sending his subordinate and nephew, Sigtrygg, the ruler of Dublin, overseas to do so. Sigtrygg sailed to
Orkney Orkney (), also known as the Orkney Islands, is an archipelago off the north coast of mainland Scotland. The plural name the Orkneys is also sometimes used, but locals now consider it outdated. Part of the Northern Isles along with Shetland, ...
, and on his return stopped at the
Isle of Man The Isle of Man ( , also ), or Mann ( ), is a self-governing British Crown Dependency in the Irish Sea, between Great Britain and Ireland. As head of state, Charles III holds the title Lord of Mann and is represented by a Lieutenant Govern ...
. These islands had been occupied by the Vikings long before and the Hiberno-Norse had close ties with Orkney and the Isle of Man. There was even a precedent for employing Norsemen from the isles; they had been used by Sigtrygg's father, Amlaíb Cuarán, in 980, and by Sigtrygg himself in 990. Their incentive to fight was loot, not land. It has been argued that, contrary to the assertions made in the ''Cogadh Gaedhil re Gallaibh'', this was not an attempt by the Vikings to reconquer Ireland. All of the Norsemen, both the Norse-Gaels of Dublin and the Norsemen from the Isles, were in the service of Máel Mórda. The High King had 'Vikings' in his army as well: the Hiberno-Norse of Limerick and probably those of Waterford, Wexford, and Cork as well. Some sources include a rival gang of Norse mercenaries from the Isle of Man, led by Brodir's own brother, Óspak. The two brothers would go on to fight on opposite sides in the battle. Some scholars argue that, essentially, this conflict was an Irish civil war with minor foreign participation.McCullough(2002), p.109 However, the revisionist idea of Brian Boru's campaign and the battle of Clontarf being more akin to a civil war than an international war between the Irish and Norsemen has recently been challenged by researchers from the Universities of Coventry, Oxford and Sheffield. Using network analysis to mathematically analyze the medieval text, they found over 1000 relationships between about 300 characters; as such, the traditional view may be more accurate after all. Along with whatever troops he obtained from abroad, Brian mustered troops from his home province of Munster, southern Connacht, and the province of Meath, the latter contingent commanded by his old rival Máel Sechnaill mac Domnaill. Brian's army may have outnumbered Máel Mórda's, since Brian felt secure enough to dispatch a mounted detachment under the command of his youngest son, Donnchad, to raid southern Leinster, presumably hoping to force Máel Mórda to release his contingents from there to return to defend their homes. Brian was also joined by the aforementioned Óspak, a Norseman, brother of Brodir. Initially the two brothers sailed from the
Isle of Man The Isle of Man ( , also ), or Mann ( ), is a self-governing British Crown Dependency in the Irish Sea, between Great Britain and Ireland. As head of state, Charles III holds the title Lord of Mann and is represented by a Lieutenant Govern ...
to fight against Brian with the Leinster forces. However, after a disagreement, Brodir planned to kill Óspak and his men the next morning. Óspak and his soldiers then fled during the night with 10 ships and sailed around Ireland to
Connacht Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
, where Óspak converted to Christianity and swore allegiance to Brian. He fought on the opposite side to his brother at the battle. Brian and Máel Sechnaill sent their forces to torch and plunder much of the countryside and hinterland north of Clontarf as far as the
Howth Howth ( ; ; ) is a peninsular village and outer suburb of Dublin, Republic of Ireland, Ireland. The district as a whole occupies the greater part of the peninsula of Howth Head, which forms the northern boundary of Dublin Bay, and includes the ...
Peninsula. However, in one of their raids, one of Máel Sechnaill's sons, Flann, was killed when a raiding party he was leading was ambushed by the Norse, with a total of over 150 Irish killed.Seán Duffy, History Ireland A disagreement between Brian and Máel Sechnaill resulted in the latter withdrawing his support. Brian sent a messenger to find Donnchad and ask him to return with his detachment, but the call for help came too late. To compound Brian's problems, Máel Mórda's Norse contingents, led by Sigurd Hlodvirsson,
Earl of Orkney Earl of Orkney, historically Jarl of Orkney, is a title of nobility encompassing the archipelagoes of Orkney and Shetland, which comprise the Northern Isles of Scotland. Originally Scandinavian Scotland, founded by Norse invaders, the status ...
, and Brodir of the Isle of Man, arrived on
Palm Sunday Palm Sunday is the Christian moveable feast that falls on the Sunday before Easter. The feast commemorates Christ's triumphal entry into Jerusalem, an event mentioned in each of the four canonical Gospels. Its name originates from the palm bran ...
, 18 April. The battle occurred five days later, on
Good Friday Good Friday, also known as Holy Friday, Great Friday, Great and Holy Friday, or Friday of the Passion of the Lord, is a solemn Christian holy day commemorating the crucifixion of Jesus and his death at Calvary (Golgotha). It is observed during ...
, 23 April 1014, just north of the city of
Dublin Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...
, at Clontarf.McCullough(2002), p. 111 All of the accounts state that the
Battle of Clontarf The Battle of Clontarf () took place on 23 April 1014 at Clontarf, near Dublin, on the east coast of Ireland. It pitted an army led by Brian Boru, High King of Ireland, against a Norse- Irish alliance comprising the forces of Sigtrygg Silkbea ...
lasted all day, but this may be an exaggeration. The fighting was incredibly bloody by all accounts. Brian's army, however, eventually broke the enemy line and the Vikings attempted to flee for their ships which were in the bay. However at this time the tide came in and many of them drowned attempting to swim for their ships as they were relentlessly pursued by the Irish.Duffy (2013) Brian's Irish army won partly through a small numerical advantage, and the use of small spears which they threw at the enemy. According to one account, Maél Sechnaill had a change of heart and arrived late to the battle and, after the death of Brian, led the Irish army and completed the rout. Apart from Brian himself, much of the Irish royal bloodline was wiped out in the battle. The king's son and heir, Murchad, was killed. According to one account he killed over 100 enemies, but the details of his own death are unknown. He died shortly after the Viking line broke. Brian's grandson and Murchad's son Toirdelbach was also killed. Aged 15, he led the Irish
infantry Infantry, or infantryman are a type of soldier who specialize in ground combat, typically fighting dismounted. Historically the term was used to describe foot soldiers, i.e. those who march and fight on foot. In modern usage, the term broadl ...
pursuing the Vikings as they fled to the sea. He was knocked over by a wave, knocking him unconscious after hitting his head, and he drowned. On the Leinster and Viking side, many were also killed. Maél Morda was killed in the fighting. Sigurd the Stout of Orkney was also killed by Murchad. Brodir, who likely killed Brian, was captured and executed after the battle.


Death

There are many accounts of how Brian was killed. Some suggest he was killed during heroic man-to-man combat, although others specify that he was not involved in the battle due to his advanced age and frailty. According to the '' Cogadh Gaedhel re Gallaibh'', the elderly Brian Boru spent the day before his death away from combat, kneeling upon a cushion, and singing the
Psalms The Book of Psalms ( , ; ; ; ; , in Islam also called Zabur, ), also known as the Psalter, is the first book of the third section of the Tanakh (Hebrew Bible) called ('Writings'), and a book of the Old Testament. The book is an anthology of B ...
, paters, aves, and other prayers using a Pater Noster cord. He was killed by fleeing Viking mercenaries shortly after learning from his attendant that, despite his forces having won a great victory, his son Murchadh's standard had just fallen. The most common accounts attribute the killing of Brian Boru to the Viking mercenary Brodir of the
Isle of Man The Isle of Man ( , also ), or Mann ( ), is a self-governing British Crown Dependency in the Irish Sea, between Great Britain and Ireland. As head of state, Charles III holds the title Lord of Mann and is represented by a Lieutenant Govern ...
while praying in his tent at Clontarf. According to the 12th century ''
Cogad Gáedel re Gallaib ''Cogad Gáedel re Gallaib'' ("The War of the Irish with the Foreigners") is a medieval Irish text that tells of the depredations of the Vikings and Uí Ímair dynasty in Ireland and the Irish king Brian Boru's great war against them, begin ...
'', Brian was visited in a dream on the night prior to the battle by a Pre-Christian goddess from the
Irish mythology Irish mythology is the body of myths indigenous to the island of Ireland. It was originally Oral tradition, passed down orally in the Prehistoric Ireland, prehistoric era. In the History of Ireland (795–1169), early medieval era, myths were ...
named
Aibell In Irish legend Aibell (sometimes Aoibheall (modern Irish spelling)), also anglicised as Aeval or Eevill) was a Pre-Christian goddess from the Irish mythology of Munster and the guardian spirit of the Dál gCais, the Delbhna, and the Clan � ...
. Aibell had been demoted since St Patrick to a Fairy Queen ruling over the
Celtic Otherworld In Celtic mythology, the Otherworld is the realm of the Celtic deities, deities and possibly also the dead. In Gaels, Gaelic and Celtic Britons, Brittonic myth it is usually a supernatural realm of everlasting youth, beauty, health, abundance an ...
of Thomond and was traditionally considered the guardian spirit, protectress, and the
banshee A banshee ( ; Irish language, Modern Irish , from , "woman of the Tumulus#Ireland, fairy mound" or "fairy woman") is a female spirit in Irish folklore who heralds the death of a family member, usually by screaming, wailing, shrieking, or kee ...
of King Brian's clan and dynasty. In the dream, Aibell is said to have warned Brian of his impending death and further prophesied that whichever of his sons he saw first in the morning would succeed him. Believing that the dream predicted his destiny and also, it is implied, not wishing to outlive his son Murchadh, Brian refused to seek shelter from the retreating Vikings and even chose to dismiss his bodyguards at the critical moment. The ''Cogadh Gaedhel re Gallaibh'' alleges that when Brian Boru and Brodir came face to face, similarly to
Hamlet ''The Tragedy of Hamlet, Prince of Denmark'', often shortened to ''Hamlet'' (), is a Shakespearean tragedy, tragedy written by William Shakespeare sometime between 1599 and 1601. It is Shakespeare's longest play. Set in Denmark, the play (the ...
and Laertes, all they accomplished was to kill each other. According to ''
Njáls saga ''Njáls saga'' ( ), also ''Njála'' ( ), or ''Brennu-Njáls saga'' ( ) (Which can be translated as ''The Story of Burnt Njáll'', or ''The Saga of Njáll the Burner''), is a thirteenth-century Icelandic saga that describes events between 960 a ...
'', on the other hand, Brodir was captured almost immediately afterwards and brutally tortured to death by Ulf the Quarrelsome, a bodyguard and possibly a relative through marriage of Brian and who was fiercely loyal to the late king. Brodir's stomach was first slashed open with a sword, his intestines were then tied to a tree, and Brodir was forced to walk around and around the tree resulting in a slow and excruciating death from both blood loss and disembowelling. After his death, Brian's body was taken, as he had instructed moments before Brodir's arrival, for his Requiem Mass to the church upon Spittal Hill, in what is now
Swords A sword is an edged, bladed weapon intended for manual cutting or thrusting. Its blade, longer than a knife or dagger, is attached to a hilt and can be straight or curved. A thrusting sword tends to have a straighter blade with a pointed ti ...
,
County Dublin County Dublin ( or ) is a Counties of Ireland, county in Republic of Ireland, Ireland, and holds its capital city, Dublin. It is located on the island's east coast, within the Provinces of Ireland, province of Leinster. Until 1994, County Dubli ...
and then to
Armagh Armagh ( ; , , " Macha's height") is a city and the county town of County Armagh, in Northern Ireland, as well as a civil parish. It is the ecclesiastical capital of Ireland – the seat of the Archbishops of Armagh, the Primates of All ...
to be buried in the Cathedral founded by St Patrick. His tomb is said to be in the north wall of St Patrick's Cathedral in the city of Armagh. There have been further reports that the body of Brian Boru was brought back to his homeland in Munster after his death. While passing an area named Graine, located outside Urlingford on the Leinster/Munster border, Brian's army was attacked and his corpse was tied against a tree to pretend he was directing the army. In later years, artefacts—swords and clothing—strongly suggest that his army was in this area. Graine hill today has a wall which separates the two provinces and a narrow road still exists which used to be the main road connecting the diocese of Ossory and Cashel. Brian was succeeded as High King of Ireland by his former enemy, and later ally, Máel Sechnaill (Malachy Mór), who regained the title which he had previously lost to Brian many years before. He ruled until his death in 1022.


Historical view

For the last 250 years there has been a debate among historians about Ireland's Viking age and the
Battle of Clontarf The Battle of Clontarf () took place on 23 April 1014 at Clontarf, near Dublin, on the east coast of Ireland. It pitted an army led by Brian Boru, High King of Ireland, against a Norse- Irish alliance comprising the forces of Sigtrygg Silkbea ...
. The standard, and "popular", view, is that the battle ended a war between the Irish and Vikings by which Brian Boru broke Viking power in Ireland. However, revisionist historians see it as an Irish civil war in which Brian Boru's Munster and its allies defeated Leinster and Dublin, and that there were Vikings fighting on both sides."Network science shines new light on Battle of Clontarf". RTE. 24 January 2018. Retrieved 24 January 2018.Kevin O'Sullivan (24 January 2018). "Battle of Clontarf: It's a mathematical question". The Irish Times. Retrieved 24 January 2018. Centuries-old debate continues as social media analysis used to explore Viking-Irish strife ... The debate has carried on for the past 250 years. In January 2018 researchers from the Universities of Coventry, Oxford and Sheffield, led by Coventry University professor Ralph Kenna, a theoretical physicist, published a paper in the journal ''Royal Society Open Science'' that used network science to mathematically analyse the 12th-century ''Cogadh Gáedhel re Gallaibh'' ("The War of the Gaels with the Foreigners", i.e. the Danes and other Norsemen), that listed over 1000 relationships between about 300 characters, and concluded that the standard and popular view of the war between the Irish and Germanic Norsemen was broadly correct, but that the picture was nevertheless more complex than "a fully 'clear-cut' Irish versus Viking conflict". However one of the paper's co-authors, PhD student Joseph Yose, added that "Our statistical analysis ... cannot decisively resolve the debate". The revisionist theory is that the popular image of Brian—the ruler who managed to unify the regional leaders of
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
so as to free the land from a 'Danish' (
Viking Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...
) occupation—originates from the powerful influence of the ''Cogadh Gaedhil re Gallaibh'', in which Brian takes the leading role. This work is thought to have been commissioned by Brian's great-grandson
Muirchertach Ua Briain Muirchertach Ua Briain (anglicised as Murtaugh O'Brien; c. 1050 – c. 10 March 1119), son of Toirdelbach Ua Briain and great-grandson of Brian Boru, was King of Munster and later self-declared High King of Ireland. Background and early career ...
as a means of justifying the Ua Briain claim to the High Kingship, a title upon which the Uí Neill had had a near-monopoly. Recent research has suggested that it might have been commissioned by Muirchertach's contemporary and cousin, Brian Glinne Maidhir, or at least someone favourable to the line descended from Brian's son, Donnchad. The influence of this book on both scholarly and popular authors cannot be exaggerated. Until the 1970s most scholarly writing concerning the Vikings' activities in Ireland, as well as the career of Brian Boru, accepted the claims of ''Cogadh Gaedhil re Gallaibh'' at face value. While Brian may not have freed Ireland from a Norse (
Viking Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...
) occupation, simply because it was never entirely conquered by the Vikings, his rule saw consistent conflict against Vikings and Viking-founded settlements, the latter all having been founded to give raiders easier access to the interior of Ireland. In the last decade of the 8th century, Norse raiders began attacking targets in Ireland and, beginning in the mid-9th century, these raiders established the fortified camps that later grew into Ireland's first cities:
Dublin Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...
,
Limerick Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
,
Waterford Waterford ( ) is a City status in Ireland, city in County Waterford in the South-East Region, Ireland, south-east of Ireland. It is located within the Provinces of Ireland, province of Munster. The city is situated at the head of Waterford H ...
,
Wexford Wexford ( ; archaic Yola dialect, Yola: ''Weiseforthe'') is the county town of County Wexford, Republic of Ireland, Ireland. Wexford lies on the south side of Wexford Harbour, the estuary of the River Slaney near the southeastern corner of the ...
, and Cork. Within only a few generations, some Norse had converted to Christianity, intermarried with the Irish, and had often adopted the Irish language, dress and customs, thus becoming what historians refer to as the Hiberno-Norse. Such Hiberno-Norse cities occupied a tenuous position within Ireland's political scene long before the birth of Brian. They often suffered attacks from Irish rulers, and made alliances with others. The Norse, who initially attacked and subsequently settled in Ireland, were partially assimilated by the Irish. However, Brian's father was likely slain by the Norse of Limerick and he himself died during a revolt that was supported by multiple Viking leaders, specifically the Norse of Mann.


Wives and children

Brian's first wife was Mór, daughter of the king of Uí Fiachrach Aidne of Connacht. She is said to have been the mother of his sons Murchad, Conchobar and Flann. Later genealogies claimed that these sons left no descendants, although in fact Murchad's son Tairrdelbach is recorded as being killed at Clontarf along with his father and grandfather. Another wife, Echrad, was a daughter of Carlus mac Ailella, king of Uí Áeda Odba, an obscure branch of the southern
Uí Néill The Uí Néill (; meaning "descendants of Niall") are Irish dynasties that claim descent from Niall Noígíallach (Niall of the Nine Hostages), a historical King of Tara who is believed to have died around c. 405. They are generally divided ...
. She was the mother of Brian's son Tadc, whose son Toirdelbach and grandson Muirchertach rivalled Brian in power and fame. Brian's most famous marriage was with
Gormflaith (; ) is an Irish-language feminine given name meaning "blue princess" or "illustrious princess". is also a Irish mythology, Gaelic mythological national personification, personification of Ireland. The word ' is a compound of the Irish words ' ( ...
, sister of Máel Mórda of Leinster. Donnchad, who had his half-brother Tadc killed in 1023 and ruled Munster for 40 years thereafter, was the result of this union. Brian had a sixth son, Domnall. Although he predeceased his father, Domnall apparently had at least one surviving child, a son whose name is not recorded. Domnall may perhaps have been the son of Brian's fourth known wife, Dub Choblaig, who died in 1009. She was a daughter of King Cathal mac Conchobar mac Taidg of Connacht. Brian had at least three daughters, but their mothers are not recorded. Sadb, whose death in 1048 is recorded by the ''Annals of Innisfallen'', was married to
Cian In Irish mythology, Cian or Cían (), nicknamed Scal Balb, was the son of Dian Cecht, the physician of the Tuatha Dé Danann, and best known as the father of Lugh Lamhfada. Cían's brothers were Cu, Cethen, and Miach. Cían was slain by th ...
, son of Máel Muad mac Brain. Bé Binn was married to the northern Uí Néill king Flaithbertach Ua Néill. A third daughter,
Sláine Sláine (sometimes anglicized as Slaine) is an Irish language, Irish given name. People Notable people with this name include: * Slaine (rapper), hiphop MC from Boston * Sláine ingen Briain (fl. 1014), daughter of Brian Boru and wife of Sigtryg ...
, was married to Brian's stepson Sigtrygg Silkbeard of Dublin. According to '' Njal's Saga'', he had a foster-son named Kerthialfad.


Family heritage

The descendants of Brian were known as the Uí Briain (O'Brien) clan, hence the surnames Ó Briain, O'Brien, O'Brian etc. ''O'' was originally ' which in turn came from ', which means 'grandson or descendant' (of a named person). The prefix is often anglicised to ''O''', using an apostrophe instead of the Irish ( ´ ). The O'Briens subsequently ranked as one of the chief dynastic families of the country . Brian's third great-granddaughter was
Gwenllian ferch Gruffydd Gwenllian ferch Gruffydd () (''Gwenllian, daughter of Gruffydd''; 1097 – 1136) was a 12th-century Welsh rebel and Princess of Deheubarth. The daughter of Prince of Gwynedd Gruffudd ap Cynan and member of the House of Aberffraw, she marrie ...
(), Princess consort of
Deheubarth Deheubarth (; , thus 'the South') was a regional name for the Welsh kingdoms, realms of south Wales, particularly as opposed to kingdom of Gwynedd, Gwynedd (Latin: ''Venedotia''). It is now used as a shorthand for the various realms united under ...
in
Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...
, leader of the patriotic revolt and battle that contributed to the Great Revolt of 1136. The Barons Inchiquin claim descent from Brian Boru, as did Sir Donough O'Brien, 1st Baronet.


Ancestry

Ancestry of Brian Boru


Cultural heritage


Literature

''
Finnegans Wake ''Finnegans Wake'' is a novel by Irish literature, Irish writer James Joyce. It was published in instalments starting in 1924, under the title "fragments from ''Work in Progress''". The final title was only revealed when the book was publishe ...
'' (1939), by
James Joyce James Augustine Aloysius Joyce (born James Augusta Joyce; 2 February 1882 – 13 January 1941) was an Irish novelist, poet, and literary critic. He contributed to the modernist avant-garde movement and is regarded as one of the most influentia ...
, makes multiple references to Brian Boru and Clontarf, in neologisms typical of that book ("clontarfminded") and obscure references (e.g. "as true as the Vernons have Brian's sword"—McHugh points out that the Vernons, an Italian family, had an ancient sword said to be Brian Boru's). In the 1949 novel '' Silverlock'' by John Myers Myers, the death of Brian Boru is described from the main character's viewpoint. Morgan Llywelyn's '' Lion of Ireland'' (1980) is a historical novel about the life of Brian Boru. Donal O'Neill's ''Sons of Death'' (1988), a historical novel about Brian Boru, is told from the point of view of MelPatrick, a young nobleman at Brian's court. It uses the fictional device of the long-lost ''Brjánssaga'' as its source. It is the third in a series based on Irish history, beginning (vol. 1, ''Crucible''; vol. 2 ''Of Gods and Men''). The story of Brian Boru's final battle and death is told in Frank Delaney's novel ''Ireland'' (2005). Robert E. Howard wrote two versions of the Battle of Clontarf in 1931; a realistic historical novellette entitled "The Spears of Clontarf", which he modified to include fantastic elements such as the appearance of the God Odin and retitled "The Grey God Passes". "The Cairn on the Headland" is a sequel to the latter set in the present day.


Music

His name is remembered in the title of one of the oldest tunes in Ireland's traditional repertoire: " Brian Boru's March". It is still widely played by many traditional Irish musicians. He was the subject of at least two operas: ''Brian Boroihme'' (1810) by Johann Bernhard Logier (1777–1846) and ''Brian Boru'' (1896) by Julian Edwards (1855–1910). His burial in St Patrick's Cathedral is referenced in the song "Boys from the County Armagh" by Thomas P. Keenan (1866–1927). His exploits in battle serve as the inspiration for Irish folk metal band Cruachan's song, ''Born for War (The Rise of Brian Boru)''.


See also

*
Annals of Tigernach The ''Annals of Tigernach'' (Abbreviation, abbr. AT, ) are chronicles probably originating in Clonmacnoise, Ireland. The language is a mixture of Latin language, Latin and Old Irish, Old and Middle Irish. Many of the pre-historic entries come f ...
*
Annals of Ulster The ''Annals of Ulster'' () are annals of History of Ireland, medieval Ireland. The entries span the years from 431 AD to 1540 AD. The entries up to 1489 AD were compiled in the late 15th century by the scribe Ruaidhrí Ó Luin� ...
* History of Ireland (800–1169) *
History of Ireland The first evidence of human presence in Ireland dates to around 34,000 years ago, with further findings dating the presence of ''Homo sapiens'' to around 10,500 to 7,000 BC. The receding of the ice after the Younger Dryas cold phase of the Qua ...
* Lists of Irish kings * List of High Kings of Ireland


References


Citations


Secondary sources

* * * * * *


Further reading

*

* * * *
Article by the Clare County Library on Brian Boru



External resources


Battle of Clontarf website produced by Trinity College Dublin
{{DEFAULTSORT:Brian Boru Kings of Munster Kings of Limerick High Kings of Ireland 940s births 1014 deaths Burials at St Patrick's Cathedral, Armagh (Church of Ireland) Monarchs killed in action 11th-century Irish monarchs Murdered royalty O'Brien dynasty Dalcassians Year of birth uncertain 11th-century murdered monarchs