John II Komnenos or Comnenus (; 13 September 1087 – 8 April 1143) was
Byzantine emperor
The foundation of Constantinople in 330 AD marks the conventional start of the Eastern Roman Empire, which Fall of Constantinople, fell to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as legitimate rulers and exercised s ...
from 1118 to 1143. Also known as "John the Beautiful" or "John the Good" (), he was the eldest son of Emperor
Alexios I Komnenos and
Irene Doukaina and the second emperor to rule during the
Komnenian restoration of the Byzantine Empire. As he was born to a reigning emperor, he had the status of a . John was a pious and dedicated monarch who was determined to undo the damage his empire had suffered following the
Battle of Manzikert
The Battle of Manzikert or Malazgirt was fought between the Byzantine Empire and the Seljuk Empire on 26 August 1071 near Manzikert, Iberia (theme), Iberia (modern Malazgirt in Muş Province, Turkey). The decisive defeat of the Byzantine army ...
, half a century earlier.
John has been assessed as the greatest of the Komnenian emperors. This view became entrenched due to its espousal by
George Ostrogorsky in his influential book ''History of the Byzantine State'', where John is described as a ruler who, "... combined clever prudence with purposeful energy ... and
ashigh principled beyond his day." In the course of the quarter-century of his reign, John made alliances with the
Holy Roman Empire
The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
in the west, decisively defeated the
Pechenegs
The Pechenegs () or Patzinaks, , Middle Turkic languages, Middle Turkic: , , , , , , ka, პაჭანიკი, , , ; sh-Latn-Cyrl, Pečenezi, separator=/, Печенези, also known as Pecheneg Turks were a semi-nomadic Turkic peopl ...
,
Hungarians
Hungarians, also known as Magyars, are an Ethnicity, ethnic group native to Hungary (), who share a common Culture of Hungary, culture, Hungarian language, language and History of Hungary, history. They also have a notable presence in former pa ...
and
Serbs
The Serbs ( sr-Cyr, Срби, Srbi, ) are a South Slavs, South Slavic ethnic group native to Southeastern Europe who share a common Serbian Cultural heritage, ancestry, Culture of Serbia, culture, History of Serbia, history, and Serbian lan ...
in the
Balkans
The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug ...
, and personally led numerous campaigns against the
Turks in
Asia Minor
Anatolia (), also known as Asia Minor, is a peninsula in West Asia that makes up the majority of the land area of Turkey. It is the westernmost protrusion of Asia and is geographically bounded by the Mediterranean Sea to the south, the Aegean ...
. John's campaigns fundamentally changed the balance of power in the east, forcing the Turks onto the defensive; they also led to the recapture of many towns, fortresses and cities across the Anatolian peninsula. In the southeast, John extended Byzantine control from the
Maeander in the west all the way to
Cilicia
Cilicia () is a geographical region in southern Anatolia, extending inland from the northeastern coasts of the Mediterranean Sea. Cilicia has a population ranging over six million, concentrated mostly at the Cilician plain (). The region inclu ...
and
Tarsus in the east. In an effort to demonstrate the Byzantine ideal of the emperor's role as the leader of the
Christian
A Christian () is a person who follows or adheres to Christianity, a Monotheism, monotheistic Abrahamic religion based on the life and teachings of Jesus in Christianity, Jesus Christ. Christians form the largest religious community in the wo ...
world, John marched into
Muslim
Muslims () are people who adhere to Islam, a Monotheism, monotheistic religion belonging to the Abrahamic religions, Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God ...
Syria
Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...
at the head of the combined forces of Byzantium and the
Crusader states
The Crusader states, or Outremer, were four Catholic polities established in the Levant region and southeastern Anatolia from 1098 to 1291. Following the principles of feudalism, the foundation for these polities was laid by the First Crusade ...
; yet despite the great vigour with which he pressed the campaign, John's hopes were disappointed by the evasiveness of his Crusader allies and their reluctance to fight alongside his forces.
Under John, the empire's population recovered to about 10 million people.
[W. Treadgold, ''A History of the Byzantine State and Society'', p. 700] The quarter-century of John II's reign is less well recorded by contemporary or near-contemporary writers than the reigns of either his father,
Alexios I, or his son,
Manuel I. In particular little is known of the history of John's domestic rule or policies.
Physical appearance and character

The
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 ...
historian
William of Tyre
William of Tyre (; 29 September 1186) was a Middle Ages, medieval prelate and chronicler. As Roman Catholic Archdiocese of Tyre, archbishop of Tyre, he is sometimes known as William II to distinguish him from his predecessor, William I of Tyr ...
described John as short and unusually ugly, with eyes, hair and complexion so dark he was known as 'the
Moor'. Yet despite his physical appearance, John was known as ''Kaloïōannēs'', "John the Good" or "John the Beautiful"; the epithet referred to his character. Both his parents were unusually pious and John surpassed them. Members of his court were expected to restrict their conversation to serious subjects only. The food served at the emperor's table was very frugal and John lectured courtiers who lived in excessive luxury. His speech was dignified, but he engaged in repartee on occasion. All accounts agree that he was a faithful husband to his wife, an unusual trait in a medieval ruler. Despite his personal austerity, John had a high conception of the imperial role and would appear in full ceremonial splendour when this was advantageous.
[Choniates, p. 27]
John was famed for his piety and his remarkably mild and just reign. He is considered an exceptional example of a moral ruler, at a time when cruelty was the norm. He is reputed never to have condemned anyone to death or mutilation. Charity was dispensed lavishly. For this reason, he has been called the Byzantine
Marcus Aurelius
Marcus Aurelius Antoninus ( ; ; 26 April 121 – 17 March 180) was Roman emperor from 161 to 180 and a Stoicism, Stoic philosopher. He was a member of the Nerva–Antonine dynasty, the last of the rulers later known as the Five Good Emperors ...
. By the example of his personal morality and piety he effected a notable improvement in the manners of his age. Descriptions of him and his actions indicate that he had great self-control and personal courage, and was an excellent strategist and general.
Early life
John was born on 13 September 1087, the third child and first son of Emperor Alexios I Komnenos and his wife Irene Doukaina.
Joannes Zonaras describes John's birth, "And then a son was born to the emperor, who was honoured with the holy baptism in the holy church of
Hagia Sophia
Hagia Sophia (; ; ; ; ), officially the Hagia Sophia Grand Mosque (; ), is a mosque and former Church (building), church serving as a major cultural and historical site in Istanbul, Turkey. The last of three church buildings to be successively ...
by the Patriarch. He was named John and his father then crowned him with a diadem". At a young age he was associated with his father as co-emperor, sometime between 1 September and early November, 1092. The first act in the name of both emperors was issued on 15 November 1092. The occasion of John's elevation was celebrated by a special issue of coins with his parents depicted on the reverse and John crowned by Christ on the obverse.
Alexios I arranged a dynastic marriage for John. In 1104 or early 1105 John was married to the Hungarian princess
Piroska, daughter of King
Ladislaus I of Hungary
Ladislaus I (, , , ; 1040 – 29 July 1095), also known as Saint Ladislas, was King of Hungary from 1077 and King of Croatia from 1091. He was the second son of King Béla I of Hungary and Richeza of Poland, Queen of Hungary, Richeza (or Adela ...
. She was given the Greek name Irene, meaning 'peace', in Byzantium. This marriage sealed a political alliance, which would strengthen Byzantium's position in the Balkans and Adriatic. In 1106 Alexios I was campaigning against the
Serbs
The Serbs ( sr-Cyr, Срби, Srbi, ) are a South Slavs, South Slavic ethnic group native to Southeastern Europe who share a common Serbian Cultural heritage, ancestry, Culture of Serbia, culture, History of Serbia, history, and Serbian lan ...
, most probably accompanied by his son John. At this time John's wife was heavily pregnant, she was with her husband on campaign, giving birth to twins,
Alexios
Alexius is the Latinization (literature), Latinized form of the given name Alexios (, polytonic , "defender", cf. Alexander), especially common in the Byzantine Empire. The female form is Alexia (given name), Alexia () and its variants such as Ales ...
and Maria, in
Balabista, Macedonia. The question arises as to why the birth was not in Constantinople. It is reasonably supposed that John did not wish to leave his unsupported wife under the control of his mother, who would have had authority in Constantinople in the absence of both emperors. In 1108, the
Treaty of Devol recorded the submission of the defeated
Bohemond I of Antioch to " ... the great Emperor Kyr
osAlexios Komnenos and of your thrice-loved son, Emperor Kyr John born in the purple". This leaves no doubt as to John's status as co-emperor and heir apparent.
Accession to the throne

John II succeeded his father as ruling ''basileus'' in 1118. Despite his earlier coronation as co-emperor, the accession of John was contested. That Alexios I favoured John to succeed him is made obvious by the elevation of his son to the position of co-emperor. However, Alexios' influential wife,
Irene, favoured the ''
Caesar''
Nikephoros Bryennios, the husband of her eldest child
Anna Komnene.
[Magdalino, p. 207] Anna, who in infancy had been betrothed to her father's first co-emperor
Constantine Doukas, herself harboured obvious aspirations to power and the throne. During Alexios' final illness both wife and daughter exploited his physical weakness to apply pressure on him in support of their agenda for the succession. Alexios endured these constant demands without formally changing his intended successor. As Alexios lay dying in the monastery of the Mangana on 15 August 1118, John, relying on trusted relatives, especially his brother
Isaac Komnenos, gained entry into the monastery and obtained the imperial signet ring from his father. He then assembled his armed followers and rode to the
Great Palace, gathering the support of the citizenry on the way. The palace guard at first refused to admit John without clear proof of his father's wishes, however, the mob surrounding the new emperor simply forced an entry. In the palace John was acclaimed emperor. Irene, taken by surprise, was unable either to persuade her son to step down, or to induce Nikephoros to contend for the throne. In a recent biography of Anna, however, this account of events has been disputed, in particular the involvement of John's sister in any palace coup attempt during the days around Alexios' death, has been questioned. The weight of historical opinion remains that Anna tried at least twice to usurp her brother's throne, resulting in her eventual perennial 'house arrest'. Anna later complained that John and his successor, her nephew Emperor Manuel, kept her isolated from society for 30 years.
Alexios died the night following his son's decisive move to take power. John refused to attend his father's funeral, despite the pleas of his mother, because he feared a counter-coup. However, in the space of a few days, his position seemed secure. Within a year of his accession, however, John II uncovered a conspiracy to overthrow him which implicated his mother and sister. Anna's husband Nikephoros had little sympathy with her ambitions, and it was his lack of support which doomed the conspiracy. Anna was stripped of her property, which was offered to the emperor's friend
John Axouch. Axouch wisely declined and his influence ensured that Anna's property was eventually returned to her and that John II and his sister became reconciled, at least to a degree. Irene retired to a monastery and Anna seems to have been effectively removed from public life, taking up the less active occupation of historian. However, Nikephoros remained on good terms with his brother-in-law.
[Angold (1984), p. 152] One of the very few records of John's own words concerns the plot against him; he says that after ascending the throne, God "destroyed the cunning plots of my visible and invisible enemies and rescued me from every trap subjecting all my enemies under my feet". To safeguard his own succession, John
crowned his young son
Alexios
Alexius is the Latinization (literature), Latinized form of the given name Alexios (, polytonic , "defender", cf. Alexander), especially common in the Byzantine Empire. The female form is Alexia (given name), Alexia () and its variants such as Ales ...
as co-emperor around September 1119.
Military and civil administration
The family intrigues that challenged his succession to the throne probably contributed to John's approach to rulership, which was to appoint men from outside the imperial family to high office. This was a radical departure from the methods of his father, who had used the imperial family and its many connections to fill almost all senior administrative and military posts.
John Axouch was John II's closest adviser and was his only intimate friend. Axouch was a Turk captured as a child at the
Siege of Nicaea, who had been given as a gift to John's father. Emperor Alexios had thought him a good companion for his son, and so he had been brought up alongside the prince in the imperial household. Axouch was immediately appointed
Grand Domestic (in Greek: μέγας δομέστικος, ''megas domestikos''), upon the accession of John II. The Grand Domestic was the commander in chief of the Byzantine armies. It has been suggested that references to Axouch's possession of the imperial seal early in the reign of John's successor Manuel I meant that he was, in addition to his military duties, the head of the civil administration of the Empire. This was an unofficial position known at the time as the ''
mesazon'', and equivalent to a
vizier
A vizier (; ; ) is a high-ranking political advisor or Minister (government), minister in the Near East. The Abbasids, Abbasid caliphs gave the title ''wazir'' to a minister formerly called ''katib'' (secretary), who was at first merely a help ...
or 'prime-minister.' Such an appointment was remarkable, and a radical departure from the nepotism that had characterised the reign of Alexios I. The imperial family harboured some degree of resentment at this decision, which was reinforced by the fact that they were required to make
obeisance to John Axouch whenever they met him.
John's unwillingness to allow his family to influence his government to any great extent was to remain constant for the rest of his reign. John appointed a number of his father's former officials to senior administrative posts, men such as
Eustathios Kamytzes,
Michaelitzes Styppeiotes and
George Dekanos. These were men who had been politically eclipsed during the ascendancy exercised by John's mother in the later years of the reign of Alexios I.
A number of 'new men' were raised to prominence by John II, these included
Gregory Taronites who was appointed
protovestiarios,
Manuel Anemas and
Theodore Vatatzes, the latter two also became his sons-in-law. John's marriage policy, of bringing new families into the imperial orbit, may have been directed towards lessening the influence of certain prominent aristocratic clans, such as the Doukas, Diogenes and Melissenos families, some of which had produced emperors themselves in the past.
Despite his move away from close reliance on the imperial family and its connections, John's court and government had many similarities to that of his father, not least in its serious tone and piety. Indeed, an extant collection of political advice couched in poetic form, called the ''
Mousai'', are attributed to Alexios I. The ''Mousai'' are addressed directly to John II and exhort him, amongst other things, to maintain justice during his reign and a full treasury. Alexios' advice on rulership therefore continued to be available to his son, even after the old emperor's death.
The increase in military security and economic stability within Byzantine western Anatolia created by John II's campaigns allowed him to begin the establishment of a formal provincial system in these regions. The theme (province) of
Thrakesion was re-established, with its administrative centre at
Philadelphia
Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...
. A new theme, named
Mylasa and Melanoudion, was created to the south of Thrakesion.
Conspiracies of the ''sebastokrator'' Isaac

The younger brother of John II,
Isaac
Isaac ( ; ; ; ; ; ) is one of the three patriarchs (Bible), patriarchs of the Israelites and an important figure in the Abrahamic religions, including Judaism, Christianity, Islam, and the Baháʼí Faith. Isaac first appears in the Torah, in wh ...
, had been of essential support during the accession crisis. However, despite being given the highest of court titles, that of ''
sebastokrator
''Sebastokrator'' (, ; ; ), was a senior court title in the late Byzantine Empire. It was also used by other rulers whose states bordered the Empire or were within its sphere of influence (Bulgarian Empire, Serbian Empire). The word is a compound ...
'', Isaac later became estranged from his brother and became an active conspirator. With trusted advisors of his own choosing, such as John Axouch, and later the support of his son and co-emperor, Alexios, John II offered no meaningful role to Isaac in the governance of the empire. In the reign of Alexios I ''sebastokratores'' had wielded considerable power and Isaac would have had an expectation of a similar level of authority being devolved on himself. This thwarted ambition is probably what disillusioned Isaac with his brother's rule. Isaac aimed at replacing his brother as emperor. In 1130 John became aware of a plot involving Isaac and other magnates as he was leaving to campaign against the Turks. When John tried to seize Isaac, the latter escaped and fled to the
Danishmend emir
Ghazi, who received him, and later sent him to the breakaway Byzantine regime of the
Gabrades in
Trebizond. Isaac then became the guest of
Masoud, the Seljuk
Sultan of Rum, and subsequently of
Leo, the Prince of Cilician Armenia. That Isaac was seeking aid from these princes in a bid to take the Byzantine throne by force is highly likely. Such a coalition did not materialise, but Isaac seems to have retained strong support in Constantinople. In 1132 John had to return from campaign in haste, when news reached him that conspirators in Constantinople had made an appeal to Isaac to become their ruler. The triumph that John celebrated following his capture of
Kastamuni in 1133 can be seen as being a public affirmation of John's legitimacy as emperor embodied in the celebration of the defeat of external foes. The brothers were briefly reconciled in 1138, and Isaac returned to Constantinople; however, a year later Isaac was exiled to
Heraclea Pontica, where he remained for the rest of John's life. In the extensive artwork that Isaac commissioned, he made much of his
porphyrogenete status and his relationship with his imperial father, Alexios I, but he made little or no reference to his relationship to his brother John, or to the title of ''sebastokrator'' that he had received from him.
Diplomacy

The central tenet of the foreign policy of John II in the West was to maintain an alliance with the German emperors (
Holy Roman Empire
The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
). This was necessary to limit the threat posed by the Normans of southern Italy to Byzantine territory in the Balkans. This threat became especially acute after
Roger II of Sicily
Roger II or Roger the Great (, , Greek language, Greek: Ρογέριος; 22 December 1095 – 26 February 1154) was King of Kingdom of Sicily, Sicily and Kingdom of Africa, Africa, son of Roger I of Sicily and successor to his brother Simon, C ...
made himself supreme in southern Italy and assumed the title of king. Emperor
Lothair III had Byzantine backing, including a large financial subsidy, for his invasion of Norman territory in 1136, which reached as far south as
Bari
Bari ( ; ; ; ) is the capital city of the Metropolitan City of Bari and of the Apulia Regions of Italy, region, on the Adriatic Sea in southern Italy. It is the first most important economic centre of mainland Southern Italy. It is a port and ...
. Pope
Innocent II, with the
Church's possessions in Italy under threat by Roger II, who supported
Antipope Anacletus II, was also party to the alliance of Lothair and John II. However, this alliance proved unable to resist Roger, who extracted by force a recognition of his royal title from the Pope in 1139 (
Treaty of Mignano). Lothair's successor
Conrad III was approached in 1140 for a royal German bride for John's youngest son Manuel.
Bertha of Sulzbach, Conrad's sister-in-law, was chosen and despatched to Byzantium. At much the same time Roger II applied to John II for an imperial bride for his son, but was unsuccessful.
John's penchant for interfering with his wife's family, the rulers of Hungary, was problematic. The welcome accorded to ousted claimants of the Hungarian throne in Constantinople was seen by the Byzantines as a useful insurance policy and source of political leverage. However, the Hungarians treated this interference as a fighting matter. A Hungarian alliance with the Serbs produced serious consequences for continued Byzantine dominance in the western Balkans.
In the East John attempted, like his father, to exploit the differences between the Seljuq Sultan of
Iconium
Konya is a major city in central Turkey, on the southwestern edge of the Central Anatolian Plateau, and is the capital of Konya Province. During antiquity and into Seljuk times it was known as Iconium. In 19th-century accounts of the city in En ...
and the
Danishmendid dynasty controlling the northeastern, inland, parts of Anatolia. In 1134 the Seljuq sultan
Masoud provided troops for John's attack on the Danishmend-held city of Kastamuni (reoccupied immediately after the Byzantine conquest of 1133), however, the alliance proved unreliable as the Seljuq troops abandoned the expedition, decamping during the night.
[Choniates, pp. 12–13]
In the
Crusader states
The Crusader states, or Outremer, were four Catholic polities established in the Levant region and southeastern Anatolia from 1098 to 1291. Following the principles of feudalism, the foundation for these polities was laid by the First Crusade ...
of the Levant it was generally admitted that the Byzantine claims over Antioch were legally valid, though it was pragmatically viewed that only when the Byzantine emperor was in a position to enforce them militarily were they likely to be recognised in practice. The high point of John's diplomacy in the Levant was in 1137 when he extracted formal homage from the rulers of the
Principality of Antioch,
County of Edessa
The County of Edessa (Latin: ''Comitatus Edessanus'') was a 12th-century Crusader state in Upper Mesopotamia. Its seat was the city of Edessa (modern Şanlıurfa, Turkey).
In the late Byzantine period, Edessa became the centre of intellec ...
and the
County of Tripoli. The Byzantine desire to be seen as holding a level of suzerainty over all of the Crusader states was taken seriously, as evidenced by the alarm shown in the
Kingdom of Jerusalem
The Kingdom of Jerusalem, also known as the Crusader Kingdom, was one of the Crusader states established in the Levant immediately after the First Crusade. It lasted for almost two hundred years, from the accession of Godfrey of Bouillon in 1 ...
when John informed
King Fulk of his plan for an armed pilgrimage to the Holy City (1142).
[Runciman, pp. 212–213, 222–224]
Religious matters

The reign of John II was taken up with almost constant warfare and, unlike his father who delighted in active participation in theological and doctrinal disputes, John appears to have been content to leave ecclesiastical matters to the
Ecumenical Patriarch of Constantinople
The ecumenical patriarch of Constantinople () is the List of ecumenical patriarchs of Constantinople, archbishop of Constantinople and (first among equals) among the heads of the several autocephalous churches that comprise the Eastern Orthodox ...
and the church hierarchy. Only when religion impinged directly on imperial policy, as in relations with the papacy and the possible union of the Greek and Latin churches, did John take an active part. He organised a number of disputations between Greek and Latin theologians.
John, alongside his wife who shared in his religious and charitable works, is known to have undertaken church building on a considerable scale, including construction of the Monastery of Christ Pantokrator (
Zeyrek Mosque
Zeyrek Mosque () or the Monastery of the Pantokrator (; ), is a large mosque on the Fazilet Street in the Zeyrek district of Fatih in Istanbul, overlooking the Golden Horn. It is made up of two former Byzantine churches and a chapel joined tog ...
) in Constantinople. This monastery, with its three churches, has been described as one of the most important and influential architectural constructions of Middle Byzantine Constantinople. Attached to the monastery was a hospital, of 5 wards, open to people of all social classes. The hospital was staffed by trained
layman
In religious organizations, the laity () — individually a layperson, layman or laywoman — consists of all members who are not part of the clergy, usually including any non-ordained members of religious orders, e.g. a nun or a lay brother.
...
doctors rather than monks. The central of the three churches was the Komnenian funerary chapel, dedicated to St. Michael. It had twin domes, and is described in the ''typikon'' of the monastery as being in the form of a ''heroon''; this emulates the older mausolea of Constantine and Justinian in the
Church of the Holy Apostles
The Church of the Holy Apostles (, ''Agioi Apostoloi''; ), also known as the Imperial Polyandrion (imperial cemetery), was a Byzantine Eastern Orthodox church in Constantinople, capital of the Eastern Roman Empire. The first structure dated to ...
.
Very active persecution of the followers of the
Paulician and
Bogomil heresies characterised the last few years of the reign of Alexios I. No records from the reign of John mention such persecution, though countermeasures against heresy by the Byzantine Church remained in force. A
permanent synod in Constantinople investigated the writings of a deceased monk named
Constantine Chrysomallos which had been circulating in certain monasteries. These works were ordered to be burnt by the Patriarch of Constantinople,
Leo Styppes, in May 1140, on the grounds that they incorporated elements of Bogomil belief and practices.
One of the few members of the imperial family to be placed in an important position by John was his cousin,
Adrian
Adrian is a form of the Latin given name Adrianus or Hadrianus. Its ultimate origin is most likely via the former river Adria from the Venetic and Illyrian word ''adur'', meaning "sea" or "water".
The Adria was until the 8th century BC the ma ...
Komnenos (son of John's uncle the ''
sebastokrator
''Sebastokrator'' (, ; ; ), was a senior court title in the late Byzantine Empire. It was also used by other rulers whose states bordered the Empire or were within its sphere of influence (Bulgarian Empire, Serbian Empire). The word is a compound ...
''
Isaac
Isaac ( ; ; ; ; ; ) is one of the three patriarchs (Bible), patriarchs of the Israelites and an important figure in the Abrahamic religions, including Judaism, Christianity, Islam, and the Baháʼí Faith. Isaac first appears in the Torah, in wh ...
). Adrian had become a monk, adopting the monastic name John, and had accompanied the emperor on his campaigns of 1138. Soon afterwards, Adrian was appointed
Archbishop of Bulgaria as John IV of Ohrid. Bulgaria was an autocephalous see and required a prestigious man as archbishop.
Military exploits
Though he fought a number of notable pitched battles, the military strategy of John II relied on taking and holding fortified settlements in order to construct defensible frontiers. John personally conducted approximately twenty five sieges during his reign.
The Pechenegs destroyed (1122)
In 1119–1121 John defeated the
Seljuq Turks, establishing his control over southwestern
Anatolia
Anatolia (), also known as Asia Minor, is a peninsula in West Asia that makes up the majority of the land area of Turkey. It is the westernmost protrusion of Asia and is geographically bounded by the Mediterranean Sea to the south, the Aegean ...
. However, immediately afterwards, in 1122, John quickly transferred his troops to Europe to counter a
Pecheneg invasion across the
Danube
The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...
frontier into
Paristrion. These invaders had been auxiliaries of
Vladimir Monomakh, the Prince of
Kiev
Kyiv, also Kiev, is the capital and most populous List of cities in Ukraine, city of Ukraine. Located in the north-central part of the country, it straddles both sides of the Dnieper, Dnieper River. As of 1 January 2022, its population was 2, ...
. John surrounded the Pechenegs as they burst into
Thrace
Thrace (, ; ; ; ) is a geographical and historical region in Southeast Europe roughly corresponding to the province of Thrace in the Roman Empire. Bounded by the Balkan Mountains to the north, the Aegean Sea to the south, and the Black Se ...
, tricked them into believing that he would grant them a favourable treaty, and then launched a devastating surprise attack upon their fortified camp. The ensuing
Battle of Beroia was hard-fought, John was wounded in the leg by an arrow, but by the end of the day the Byzantine army had won a crushing victory. The decisive moment of the battle was when John led the
Varangian Guard
The Varangian Guard () was an elite unit of the Byzantine army from the tenth to the fourteenth century who served as personal bodyguards to the Byzantine emperors. The Varangian Guard was known for being primarily composed of recruits from Nort ...
, largely composed of Englishmen, to assault defensive Pecheneg wagon
laager, employing their famous axes to hack their way in.
[Choniates, p. 11] The battle put an effective end to the Pechenegs as an independent people; many of the captives taken in the conflict were settled as soldier-farmers within the Byzantine frontier.
[Angold (1984), p. 153]
Conflict with Venice (1124–1126)
After his accession, John II had refused to confirm his father's
1082 treaty with the
Republic of Venice
The Republic of Venice, officially the Most Serene Republic of Venice and traditionally known as La Serenissima, was a sovereign state and Maritime republics, maritime republic with its capital in Venice. Founded, according to tradition, in 697 ...
, which had given the Italian republic unique and generous trading rights within the Byzantine Empire. Yet the change in policy was not motivated by financial concerns. An incident involving the abuse of a member of the imperial family by Venetians led to a dangerous conflict, especially as Byzantium had depended on Venice for its naval strength. After a Byzantine retaliatory attack on
Kerkyra, John exiled the Venetian merchants from Constantinople. But this produced further retaliation, and a Venetian fleet of 72 ships plundered
Rhodes
Rhodes (; ) is the largest of the Dodecanese islands of Greece and is their historical capital; it is the List of islands in the Mediterranean#By area, ninth largest island in the Mediterranean Sea. Administratively, the island forms a separ ...
,
Chios
Chios (; , traditionally known as Scio in English) is the fifth largest Greece, Greek list of islands of Greece, island, situated in the northern Aegean Sea, and the List of islands in the Mediterranean#By area, tenth largest island in the Medi ...
,
Samos
Samos (, also ; , ) is a Greek island in the eastern Aegean Sea, south of Chios, north of Patmos and the Dodecanese archipelago, and off the coast of western Turkey, from which it is separated by the Mycale Strait. It is also a separate reg ...
,
Lesbos
Lesbos or Lesvos ( ) is a Greek island located in the northeastern Aegean Sea. It has an area of , with approximately of coastline, making it the third largest island in Greece and the List of islands in the Mediterranean#By area, eighth largest ...
,
Andros
Andros (, ) is the northernmost island of the Greece, Greek Cyclades archipelago, about southeast of Euboea, and about north of Tinos. It is nearly long, and its greatest breadth is . It is for the most part mountainous, with many fruitful and ...
and captured
Kefalonia
Kefalonia or Cephalonia (), formerly also known as Kefallinia or Kephallonia (), is the largest of the Ionian Islands in western Greece and the 6th-largest island in Greece after Crete, Euboea, Lesbos, Rhodes and Chios. It is also a separate regio ...
in the
Ionian Sea
The Ionian Sea (, ; or , ; , ) is an elongated bay of the Mediterranean Sea. It is connected to the Adriatic Sea to the north, and is bounded by Southern Italy, including Basilicata, Calabria, Sicily, and the Salento peninsula to the west, ...
.
[J. Norwich, ''Byzantium: The Decline and Fall'', 70] Eventually John was forced to come to terms; the war was costing him more than it was worth, and he was not prepared to transfer funds from the imperial land forces to the navy for the construction of new ships. John re-confirmed the treaty of 1082, in August 1126.
War with the Hungarians and Serbs (1127–1129 – chronology uncertain)
John's marriage to the Hungarian princess
Piroska involved him in the dynastic struggles of the
Kingdom of Hungary
The Kingdom of Hungary was a monarchy in Central Europe that existed for nearly a millennium, from 1000 to 1946 and was a key part of the Habsburg monarchy from 1526-1918. The Principality of Hungary emerged as a Christian kingdom upon the Coro ...
. In giving asylum to Álmos, a blinded claimant to the Hungarian throne, John aroused the suspicion of the Hungarians. The Hungarians, led by
Stephen II, then invaded Byzantium's Balkan provinces in 1127, with hostilities lasting until 1129; however, an alternative chronology has been suggested with the Hungarian attack and Byzantine retaliation taking place in 1125 with a renewal of hostilities in 1126.
[Angold (1984), p. 154] John launched a punitive raid against the
Serbs
The Serbs ( sr-Cyr, Срби, Srbi, ) are a South Slavs, South Slavic ethnic group native to Southeastern Europe who share a common Serbian Cultural heritage, ancestry, Culture of Serbia, culture, History of Serbia, history, and Serbian lan ...
, who had dangerously aligned themselves with Hungary, many of whom were rounded up and transported to
Nicomedia
Nicomedia (; , ''Nikomedeia''; modern İzmit) was an ancient Greece, ancient Greek city located in what is now Turkey. In 286, Nicomedia became the eastern and most senior capital city of the Roman Empire (chosen by the emperor Diocletian who rul ...
in Asia Minor to serve as military colonists. This was done partly to cow the Serbs into submission (Serbia was, at least nominally, a Byzantine protectorate), and partly to strengthen the Byzantine frontier in the east against the Turks. The Serbs were forced to acknowledge Byzantine suzerainty once again.
The Serbian campaign may have taken place between two distinct phases in the war against Hungary.
[Fine, p. 235] The Hungarians attacked
Belgrade
Belgrade is the Capital city, capital and List of cities in Serbia, largest city of Serbia. It is located at the confluence of the Sava and Danube rivers and at the crossroads of the Pannonian Basin, Pannonian Plain and the Balkan Peninsula. T ...
,
Nish and
Sofia
Sofia is the Capital city, capital and List of cities and towns in Bulgaria, largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain, in the western part of the country. The city is built west of the Is ...
; John, who was near
Philippopolis in Thrace, counterattacked, supported by a naval flotilla operating on the
Danube
The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...
.
After a challenging campaign, the details of which are obscure, the emperor managed to defeat the Hungarians and their
Serbia
, image_flag = Flag of Serbia.svg
, national_motto =
, image_coat = Coat of arms of Serbia.svg
, national_anthem = ()
, image_map =
, map_caption = Location of Serbia (gree ...
n allies at the fortress of
Haram
''Haram'' (; ) is an Arabic term meaning 'taboo'. This may refer to either something sacred to which access is not allowed to the people who are not in a state of purity or who are not initiated into the sacred knowledge; or, in direct cont ...
or Chramon, which is the modern
Nova Palanka; many Hungarian troops were killed when a bridge they were crossing collapsed as they were fleeing from a Byzantine attack. Following this the Hungarians renewed hostilities by attacking Braničevo, which was immediately rebuilt by John. Further Byzantine military successes, Choniates mentions several engagements, resulted in a restoration of peace.
[A. Urbansky, ''Byzantium and the Danube Frontier'', 46] The Byzantines were confirmed in their control of Braničevo, Belgrade and Zemun and they also recovered the region of
Sirmium
Sirmium was a city in the Roman province of Pannonia, located on the Sava river, on the site of modern Sremska Mitrovica in the Vojvodina autonomous province of Serbia. First mentioned in the 4th century BC and originally inhabited by Illyrians ...
(called Frangochorion in Choniates), which had been Hungarian since the 1060s. The Hungarian pretender Álmos died in 1129, removing the major source of friction.
War of attrition against the Anatolian Turks (1119–20, 1130–35, 1139–40)

Early in John's reign the Turks were pressing forward against the Byzantine frontier in western Asia Minor. In 1119, the Seljuqs had cut the land route to the city of
Attaleia on the southern coast of Anatolia. John II and Axouch the Grand Domestic
besieged and recaptured
Laodicea in 1119 and
took Sozopolis by storm in 1120, re-opening land communication with Attaleia. This route was especially important as it also led to Cilicia and the Crusader states of Syria.
Following the end of hostilities with Hungary, John was able to concentrate on Asia Minor during most of his remaining years. He undertook annual campaigns against the
Danishmendid emirate in
Malatya
Malatya (; ; Syriac language, Syriac ܡܠܝܛܝܢܐ Malīṭīná; ; Ancient Greek: Μελιτηνή) is a city in the Eastern Anatolia region of Turkey and the capital of Malatya Province. The city has been a human settlement for thousands of y ...
(Melitene) on the upper
Euphrates
The Euphrates ( ; see #Etymology, below) is the longest and one of the most historically important rivers of West Asia. Tigris–Euphrates river system, Together with the Tigris, it is one of the two defining rivers of Mesopotamia (). Originati ...
from 1130 to 1135. Thanks to his energetic campaigning, Turkish attempts at expansion in Asia Minor were halted, and John prepared to take the fight to the enemy. In order to restore the region to Byzantine control, he led a series of well planned and executed campaigns against the Turks, one of which resulted in the reconquest of the ancestral home of the Komnenoi at
Kastamonu
Kastamonu, formerly Kastamone/Castamone () and Kastamon/Castamon (), is a city in northern Turkey. It is the seat of Kastamonu Province and Kastamonu District. (Kastra Komnenon); he then left a garrison of 2,000 men at
Gangra. John quickly earned a formidable reputation as a wall-breaker, taking one stronghold after another from his enemies. Regions that had been lost to the empire since the
Battle of Manzikert
The Battle of Manzikert or Malazgirt was fought between the Byzantine Empire and the Seljuk Empire on 26 August 1071 near Manzikert, Iberia (theme), Iberia (modern Malazgirt in Muş Province, Turkey). The decisive defeat of the Byzantine army ...
were recovered and garrisoned. Yet resistance, particularly from the Danishmends of the northeast, was strong, and the difficult nature of holding the new conquests is illustrated by the fact that Kastamonu was recaptured by the Turks even as John was in Constantinople celebrating its return to Byzantine rule. John persevered, however, and Kastamonu soon changed hands once more.
In the spring of 1139, the emperor campaigned with success against Turks, probably nomadic Turkomans, who were raiding the regions along the
Sangarios River, striking their means of subsistence by driving off their herds. He then marched for the final time against the
Danishmend Turks, his army proceeding along the southern coast of the
Black Sea
The Black Sea is a marginal sea, marginal Mediterranean sea (oceanography), mediterranean sea lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bound ...
through
Bithynia
Bithynia (; ) was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Paphlagonia to the northeast a ...
and
Paphlagonia
Paphlagonia (; , modern translit. ''Paflagonía''; ) was an ancient region on the Black Sea coast of north-central Anatolia, situated between Bithynia to the west and Pontus (region), Pontus to the east, and separated from Phrygia (later, Galatia ...
. The breakaway Byzantine regime of
Constantine Gabras in
Trebizond was ended, and the region of
Chaldia brought back under direct imperial control. John then besieged but failed to take the city of
Neocaesarea, in 1140. The Byzantines were defeated by the conditions rather than by the Turks: the weather was very bad, large numbers of the army's horses died, and provisions became scarce.
[J. Norwich, ''Byzantium: The Decline and Fall'', 82][Angold (1984), p. 157]
Campaigning in Cilicia and Syria (1137–1138)
In the Levant, the emperor sought to reinforce Byzantine claims to suzerainty over the
Crusader States and to assert his rights over Antioch. In 1137 he conquered
Tarsus,
Adana
Adana is a large city in southern Turkey. The city is situated on the Seyhan River, inland from the northeastern shores of the Mediterranean Sea. It is the administrative seat of the Adana Province, Adana province, and has a population of 1 81 ...
, and
Mopsuestia from the
Principality of Armenian Cilicia, and in 1138 Prince
Levon I of Armenia and most of his family were brought as captives to Constantinople.
[J. Norwich, ''Byzantium: The Decline and Fall'', 76] This opened the route to the
Principality of Antioch, where
Raymond of Poitiers, Prince of Antioch, and
Joscelin II,
Count of Edessa, recognized themselves as vassals of the emperor in 1137. Even
Raymond II, the
Count of Tripoli
The count of Tripoli was the ruler of the County of Tripoli, a crusader state from 1102 through to 1289. Of the four major crusader states in the Levant, Tripoli was created last.
The history of the counts of Tripoli began with Raymond IV, Coun ...
, hastened northwards to pay homage to John, repeating the homage that his predecessor had given John's father in 1109. There then followed a joint campaign as John led the armies of Byzantium, Antioch, and Edessa against Muslim Syria. Aleppo proved too strong to attack during an
attempted siege, but the fortresses of Balat,
Biza'a
B'zaah () is a town located east of the city of al-Bab in northern-central Aleppo Governorate, northwestern Syria. It is administratively part of Nahiya al-Bab in al-Bab District. The town is inhabited by Syrian Turkmen, Turkmen and had a populat ...
,
Athareb,
Maarat al-Numan, and
Kafartab were taken by assault.
Although John fought hard for the Christian cause in the campaign in Syria, his allies Prince Raymond of Antioch and Count Joscelin II of Edessa remained in their camp playing
dice
A die (: dice, sometimes also used as ) is a small, throwable object with marked sides that can rest in multiple positions. Dice are used for generating random values, commonly as part of tabletop games, including dice games, board games, ro ...
and feasting instead of helping to press the siege of the city of
Shaizar
Shaizar or Shayzar (; in modern Arabic Saijar; Hellenistic name: Larissa in Syria, Λάρισσα εν Συρία in Greek language, Greek) is a town in northern Syria, administratively part of the Hama Governorate, located northwest of Hama. Near ...
. The Crusader Princes were suspicious of each other and of John, and neither wanted the other to gain from participating in the campaign. Raymond also wanted to hold on to Antioch, which he had agreed to hand over to John if the campaign was successful in capturing
Aleppo
Aleppo is a city in Syria, which serves as the capital of the Aleppo Governorate, the most populous Governorates of Syria, governorate of Syria. With an estimated population of 2,098,000 residents it is Syria's largest city by urban area, and ...
, Shaizar, Homs, and Hama. Latin and Muslim sources describe John's energy and personal courage in prosecuting the siege. The city was taken, but the citadel defied assault. The Emir of Shaizar offered to pay a large indemnity, become John's vassal, and pay yearly tribute. John had lost all confidence in his allies, and a Muslim army under Imad ad-Din Zengi, Zengi was approaching to try to relieve the city, therefore the emperor reluctantly accepted the offer. The emperor was distracted by a Seljuq raid on Cilicia and developments in the west, where he was pursuing a Holy Roman Empire, German alliance directed against the threat posed by the Normans of Sicily. Joscelin and Raymond conspired to delay the promised handover of Antioch's citadel to the emperor, stirring up popular unrest in the city directed at John and the local Greek community. John had little choice but to leave Syria with his ambitions only partially realised.
Final campaigns (1142)
In early 1142 John campaigned against the Seljuqs of Iconium to secure his lines of communication through Attalia (Antalya). During this campaign his eldest son and co-emperor
Alexios
Alexius is the Latinization (literature), Latinized form of the given name Alexios (, polytonic , "defender", cf. Alexander), especially common in the Byzantine Empire. The female form is Alexia (given name), Alexia () and its variants such as Ales ...
died of a fever. Having secured his route, John embarked on a new expedition into Syria determined to reduce Antioch to direct imperial rule. This expedition included a planned pilgrimage to Jerusalem on which he intended to take his army. King Fulk of Jerusalem, fearing that the emperor's presence with overwhelming military force would constrain him to make an act of homage and formally recognise Byzantine suzerainty over his kingdom, begged the emperor to bring only a modest escort. Fulk cited the inability of his largely barren kingdom to support the passage of a substantial army.
[J. Harris, ''Byzantium and The Crusades'', p. 86] This lukewarm response resulted in John II deciding to postpone his pilgrimage. John descended rapidly on northern Syria, forcing Joscelin II of Edessa to render hostages, including his daughter, as a guarantee of his good behaviour. He then advanced on Antioch demanding that the city and its citadel be surrendered to him. Raymond of Poitiers played for time, putting the proposal to the vote of the Antiochene general assembly. With the season well advanced John decided to take his army into winter quarters in Cilicia, proposing to renew his attack on Antioch the following year.
Death and succession

Having prepared his army for a renewed attack on Antioch, John amused himself by hunting wild boar on Mount Taurus in
Cilicia
Cilicia () is a geographical region in southern Anatolia, extending inland from the northeastern coasts of the Mediterranean Sea. Cilicia has a population ranging over six million, concentrated mostly at the Cilician plain (). The region inclu ...
, where he accidentally cut himself on the hand with a poisoned arrow. John initially ignored the wound and it became infected. He died a number of days after the accident, on 8 April 1143, probably of septicaemia. It has been suggested that John was assassinated by a conspiracy within the units of his army of Latin origins who were unhappy at fighting their co-religionists of Antioch, and who wanted to place his pro-western son Manuel on the throne. However, there is very little overt support for this hypothesis in the primary sources. John's final action as emperor was to choose Manuel I Komnenos, Manuel, the younger of his surviving sons, to be his successor. John is recorded as citing two main reasons for choosing Manuel over his older brother Isaac Komnenos (son of John II), Isaac: Isaac's irascibility, and the courage that Manuel had shown on campaign at
Neocaesarea. Another theory alleges that the reason for this choice was the AIMA prophecy, which foretold that John's successor should be one whose name began with an "M". Fittingly, John's close friend John Axouch, although he is recorded as having tried hard to persuade the dying emperor that Isaac was the better candidate to succeed, was instrumental in ensuring that Manuel's assumption of power was free from any overt opposition.
The legacy of John II
Historian John Birkenmeier argued that John's reign was the most successful of the Komnenian period. In ''The Development of the Komnenian Army 1081–1180,'' he stresses the wisdom of John's approach to warfare, which focused on sieges rather than risking pitched battles. Birkenmeier argues that John's strategy of launching annual campaigns with limited, realistic objectives was a more sensible one than that followed by his son Manuel I Komnenos, Manuel I. According to this view, John's campaigns benefited the Byzantine Empire because they protected the empire's heartland, which lacked reliable borders, while gradually extending its territory in Asia Minor. The Turks were forced onto the defensive, while John kept his diplomatic situation relatively simple by allying with the Holy Roman Emperor against the Normans of Sicily.
Overall, it is clear that John II Komnenos left the empire a great deal better off than he had found it. By the time of his death substantial territories had been recovered, and the goals of the recovery of control over central Anatolia and the re-establishment of a frontier on the
Euphrates
The Euphrates ( ; see #Etymology, below) is the longest and one of the most historically important rivers of West Asia. Tigris–Euphrates river system, Together with the Tigris, it is one of the two defining rivers of Mesopotamia (). Originati ...
seemed achievable. However some Greeks of the interior of Anatolia were becoming increasingly accustomed to Turkish rule and often found it preferable to that of Byzantium, as seen in the Battle of Lake Beyşehir, Lake Pousgouse. Also, though it was relatively easy to extract submission and admissions of vassalage from the Anatolian Turks, Serbs and Crusader States of the Levant, converting these relationships into concrete gains for the security of the Empire had proven elusive. These problems were left for his gifted and mercurial son, Manuel, to attempt to solve.
Family

John II Komnenos married Princess Piroska of Hungary (renamed Irene), a daughter of King Ladislaus I of Hungary in 1104; the marriage was intended as compensation for the loss of some territories to King Coloman of Hungary. She played little part in government, devoting herself to piety and their large brood of children. Irene died on 13 August 1134, and was later venerated as Saint Irene. John II and Irene had 8 children:
[Bucossi and Suarez, p xix]
# Alexios Komnenos (co-emperor), Alexios Komnenos (October 1106 – summer 1142), co-emperor from 1119 to 1142
# Maria Komnene (twin to Alexios), who married John Roger Dalassenos
# Andronikos Komnenos (son of John II), Andronikos Komnenos (died 1142)
# Anna Komnene ( – after 1149), who married the admiral Stephen Kontostephanos, who died in battle in 1149. The couple had four children.
# Isaac Komnenos (son of John II), Isaac Komnenos ( – after 1154), raised to ''sebastokrator'' in 1122, he was superseded in the succession in favour of Manuel in 1143; married twice and had several children.
# Theodora Komnene ( – before May 1157), who married the military commander
Manuel Anemas, who was killed in action, after which she entered a monastery. The couple had at least four children.
# Eudokia Komnene ( – before 1150), who married the military commander
Theodore Vatatzes. She had at least six children, but died early.
# Manuel I Komnenos (28 November 1118 – 21 September 1180), became emperor, and reigned 1143–1180.
Ancestry
See also
* Byzantium under the Komnenos dynasty
* Komnenian army
* List of Byzantine emperors
Notes
External links
John II Comnenus' Hungarian campaigns
Further reading
* Lau, Maximilian C. G. (2023).
Emperor John II Komnenos: Rebuilding New Rome 1118-1143'. Oxford University Press. .
References
Sources
;Primary
* Niketas Choniates, critical edition and translation by
* John Kinnamos, critical edition and translation by
*
William of Tyre
William of Tyre (; 29 September 1186) was a Middle Ages, medieval prelate and chronicler. As Roman Catholic Archdiocese of Tyre, archbishop of Tyre, he is sometimes known as William II to distinguish him from his predecessor, William I of Tyr ...
, ''Historia Rerum in Partibus Transmarinis Gestarum'' (''A History of Deeds Done Beyond the Sea''), translated by E. A. Babock and A. C. Krey (Columbia University Press, 1943). See the original text in th
Latin library
;Secondary
* Michael Angold, Angold, Michael, (1984) ''The Byzantine Empire 1025–1204, a political history'', Longman.
* Michael Angold, Angold, Michael, (1995) ''Church and Society in Byzantium under the Comneni, 1081–1261.'' Cambridge University Press.Poetry and its Contexts in Eleventh-century Byzantium
* Bernard, F. and Demoen, K. (2013) ''Poetry and its Contexts in Eleventh-century Byzantium'', Ashgate Publishing
*
* Bucossi, Alessandra and Suarez, Alex R. (2016) ''John II Komnenos, emperor of Byzantium: in the shadow of father and son'', Routledge.
* Dennis, G.T. (2001) ''Death in Byzantium'', Dumbarton Oaks Papers, Vol. 55, pp. 1–7, Dumbarton Oaks, Trustees for Harvard University
*
* Finlay, George (1854), ''History of the Byzantine and Greek Empires from 1057–1453'', Volume 2, William Blackwood & Sons
*
* Harris, Jonathan (2014), ''Byzantium and the Crusades'', Bloomsbury, 2nd ed.
*
*
* Linardou, K. (2016) "Imperial Impersonations", in ''John II Komnenos, Emperor of Byzantium: In the Shadow of Father and Son'', Bucossi, A. and Suarez, A.R. (eds.) pp. 155–182, Routledge, Abingdon and New York.
* Loos, Milan (1974) ''Dualist Heresy in the Middle Ages'' Vol. 10, Springer, The Hague.
*
* Magdalino, P. (2016) "The Triumph of 1133", in ''John II Komnenos, Emperor of Byzantium: In the Shadow of Father and Son'', Bucossi, A. and Suarez, A.R. (eds.) pp. 53–70, Routledge, Abingdon and New York.
* Neville, L. (2016) "Anna Komnene: The Life & Work of a Medieval Historian", Oxford University Press.
* Necipoğlu, Nevra (ed.) (2001) ''Byzantine Constantinople'', Brill.
* Norwich, John J. ''Byzantium; Vol. 3: The Decline and Fall''. Viking, 1995
*Ostrogorsky, G. (1980) ''History of the Byzantine State'', tr. J. Hussey, Oxford
*Ousterhhout, R. (2016) "Architecture and patronage in the age of John II", in ''John II Komnenos, Emperor of Byzantium: In the Shadow of Father and Son'', Bucossi, A. and Suarez, A. R. (eds.), pp. 135–154, Routledge, Abingdon and New York.
* Steven Runciman, Runciman, Steven (1952) ''A History of the Crusades, Vol. II: The Kingdom of Jerusalem,'' Cambridge University Press.
*Stankovic, V. (2016) "John II Komnenos Before the Year 1118", in ''John II Komnenos, Emperor of Byzantium: In the Shadow of Father and Son'', Bucossi, A. and Suarez, A. R. (eds.), pp. 11–21, Routledge, Abingdon and New York.
*Stathakopoulos, D. (2016) "John II Komnenos: a historiographical essay", in ''John II Komnenos, Emperor of Byzantium: In the Shadow of Father and Son'', Bucossi, A. and Suarez, A. R. (eds.), pp. 1–10, Routledge, Abingdon and New York.
*
* Urbansky, Andrew B. ''Byzantium and the Danube Frontier'', Twayne Publishers, 1968
*
{{DEFAULTSORT:John 02 Komnenos
John II Komnenos,
1087 births, John Komnenos
1143 deaths, John Komnenos
Komnenos dynasty
Byzantine people of the Crusades
Deaths by arrow wounds
Deaths by poisoning
Deaths from sepsis
Hunting accident deaths, John Komnenos
Family of Alexios I Komnenos
Byzantine people of the Byzantine–Seljuk wars
Burials at the Monastery of Christ Pantocrator (Constantinople)
Sons of Byzantine emperors
Byzantine people of the Byzantine–Pecheneg wars