Baldwin I (; ; July 1172 – ) was the first
Emperor of the Latin Empire of
Constantinople
Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
;
Count of Flanders
The count of Flanders was the ruler or sub-ruler of the county of Flanders, beginning in the 9th century. Later, the title would be held for a time, by the rulers of the Holy Roman Empire and Spain. During the French Revolution, in 1790, the c ...
(as Baldwin IX) from 1194 to 1205 and
Count of Hainaut (as Baldwin VI) from 1195 to 1205. Baldwin was one of the most prominent leaders of the
Fourth Crusade
The Fourth Crusade (1202–1204) was a Latin Christian armed expedition called by Pope Innocent III. The stated intent of the expedition was to recapture the Muslim-controlled city of Jerusalem, by first defeating the powerful Egyptian Ayyubid S ...
, which resulted in the
sack of Constantinople in 1204, the conquest of large parts of the
Byzantine Empire
The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived History of the Roman Empire, the events that caused the ...
, and the foundation of the
Latin Empire
The Latin Empire, also referred to as the Latin Empire of Constantinople, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. The Latin Empire was intended to replace the Byzantin ...
. The following year he was defeated at the
Battle of Adrianople by
Kaloyan, the emperor of
Bulgaria
Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
, and spent his last days as a prisoner.
Early life and family history
Baldwin was the son of Count
Baldwin V of Hainaut and Countess
Margaret I of Flanders.
[.] When the childless Count
Philip I of Flanders left on the last of his personal crusades in 1177, he designated Baldwin, his brother-in-law, as his heir. When Philip returned in 1179 after an unsuccessful siege of Harim during a joint campaign on behalf of the
Principality of Antioch, he was designated as the chief adviser of
Philip Augustus by his sickly father, King
Louis VII of France.
One year later, Philip of Flanders had his protégé married to his niece,
Isabelle of Hainaut, offering the
County of Artois and other Flemish territories as dowry, much to the dismay of Baldwin V. In 1180, war broke out between King Philip and his mentor
Philip I of Flanders, resulting in the devastation of
Picardy and
ÃŽle-de-France
The ÃŽle-de-France (; ; ) is the most populous of the eighteen regions of France, with an official estimated population of 12,271,794 residents on 1 January 2023. Centered on the capital Paris, it is located in the north-central part of the cou ...
; King Philip refused to give open battle and gained the upper hand, and
Baldwin V of Hainaut, at first allied with his brother-in-law
Philip I of Flanders, intervened on behalf of his son-in-law, King Philip, in 1184, in support of his daughter's interests.
[.]
Count Philip's wife
Elisabeth died in 1183, and Philip Augustus seized the province of
Vermandois on behalf of Elisabeth's sister,
Eleonore. Philip then remarried, to
Matilda of Portugal. Philip gave Matilda a dower of a number of major Flemish towns, in an apparent slight to Baldwin V. Fearing that he would be surrounded by the royal domain of France and the
County of Hainaut
The County of Hainaut ( ; ; ; ), sometimes spelled Hainault, was a territorial lordship within the medieval Holy Roman Empire that straddled the present-day border of Belgium and France. Its most important towns included Mons, Belgium, Mons (), n ...
, Count Philip signed a peace treaty with Philip Augustus and Count Baldwin V on 10 March 1186, recognizing the cession of Vermandois to the king, although he was allowed to retain the title
Count of Vermandois for the remainder of his life. Philip died without further issue of disease on the Third Crusade at the siege of Acre in 1191, he was succeeded in
Flanders
Flanders ( or ; ) is the Dutch language, Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, la ...
by Baldwin V of Hainaut, although the two had been on seemingly uncordial terms since the 1186 treaty.
Baldwin V thereupon ruled as Baldwin VIII of Flanders by right of marriage.
When Countess Margaret I died in 1194, Flanders descended to her eldest son, Baldwin IX.
In 1186, the younger Baldwin had married
Marie, daughter of Count
Henry I of Champagne, and
Marie of France.
[.] The chronicler
Gislebert describes Baldwin as being infatuated with his young bride, who nevertheless preferred prayer to the marital bed.
Through Marie, Baldwin had additional connections and obligations to the defenders of the Holy Land: her brother
Henry II of Champagne had been
King of Jerusalem
The king or queen of Jerusalem was the supreme ruler of the Kingdom of Jerusalem, a Crusader state founded in Jerusalem by the Latin Church, Latin Catholic leaders of the First Crusade, when the city was Siege of Jerusalem (1099), conquered in ...
in the 1190s (leaving a widow and two daughters who needed help to keep and regain their territories in Palestine). Marie's uncles
Richard I of England
Richard I (8 September 1157 – 6 April 1199), known as Richard the Lionheart or Richard Cœur de Lion () because of his reputation as a great military leader and warrior, was King of England from 1189 until his death in 1199. He also ru ...
and
Philip II of France had just been on the
Third Crusade.
Baldwin's own family had also been involved in the defence of Jerusalem: his uncle Philip had died on Crusade. Baldwin's maternal grandmother was a great-aunt of Queen
Isabella I of Jerusalem and the Counts of Flanders had tried to help Jerusalem relatives in their struggle. Baldwin wanted to continue the tradition. Margaret died in 1194, and the younger Baldwin became Count of Flanders. His father died the next year, and he succeeded to
Hainaut.
Count of Flanders and Hainaut

Baldwin took possession of a much-reduced
Flanders
Flanders ( or ; ) is the Dutch language, Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, la ...
, lessened by the large chunk, including
Artois, given by Philip of Alsace as dowry to Baldwin's sister
Isabelle of Hainaut, and another significant piece to his own wife. Isabelle had died in 1190, but King Philip still retained her dowry, on behalf of Isabelle's son, the future
Louis VIII of France. The eight years of Baldwin's rule in Flanders were dominated by his attempts to recover some of this land. After
Philip II of France took Baldwin's brother, Philippe of Namur, prisoner, Baldwin was forced to agree to a truce to ensure his safety. The Treaty of Péronne was signed in January 1200 on the condition that Baldwin receive the territories he had won during the war. Baldwin was made the
vassal
A vassal or liege subject is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe. While the subordinate party is called a vassal, the dominant party is called a suzerain ...
of Philip II, and the king returned portions of
Artois to Baldwin.
In this fight against the French king, Baldwin allied with others who had quarrels with Philip, including kings
Richard I and
John of England
John (24 December 1166 – 19 October 1216) was King of England from 1199 until his death in 1216. He lost the Duchy of Normandy and most of his other French lands to King Philip II of France, resulting in the collapse of the Angevin Empi ...
, and the
German King Otto IV. A month after the treaty, on
Ash Wednesday
Ash Wednesday is a holy day of prayer and fasting in many Western Christian denominations. It is preceded by Shrove Tuesday and marks the first day of Lent: the seven weeks of Christian prayer, prayer, Religious fasting#Christianity, fasting and ...
(23 February) 1200 in the town of
Bruges
Bruges ( , ; ; ) is the capital and largest city of the province of West Flanders, in the Flemish Region of Belgium. It is in the northwest of the country, and is the sixth most populous city in the country.
The area of the whole city amoun ...
, Baldwin 'took the cross', meaning he committed to embark on a
crusade
The Crusades were a series of religious wars initiated, supported, and at times directed by the Papacy during the Middle Ages. The most prominent of these were the campaigns to the Holy Land aimed at reclaiming Jerusalem and its surrounding t ...
, namely the
Fourth Crusade
The Fourth Crusade (1202–1204) was a Latin Christian armed expedition called by Pope Innocent III. The stated intent of the expedition was to recapture the Muslim-controlled city of Jerusalem, by first defeating the powerful Egyptian Ayyubid S ...
. He spent the next two years preparing, finally leaving on 14 April 1202.
As part of his effort to leave his domains in good order, Baldwin issued two notable charters for
Hainaut. One detailed an extensive criminal code and appears to be based on a now-lost charter of his father. The other laid down specific rules for inheritance. These are an important part of the legal tradition in Belgium.
Baldwin left behind his two-year-old daughter and his pregnant wife, Countess Marie. Marie was regent for Baldwin for the two years she remained in Flanders and Hainaut, but by early 1204, she had left both her children behind to join him in the East. They expected to return in a couple of years, but in the end, neither would see their children or their homeland again. In their absence, Baldwin's younger brother
Philip of Namur was regent in Flanders, with custody of the daughters. Baldwin's uncle William of Thy (an illegitimate son of
Baldwin IV of Hainaut) was regent for Hainaut.
Meanwhile, desperate for funds to support themselves and pay for their expenses, the leaders of the Fourth Crusade were persuaded by the
Venetians (who had built the crusaders' fleet) to divert to
Constantinople
Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
. The Venetians had had designs on the Byzantine capital for some time, and also wished to revenge themselves for the
Massacre of the Latins
The Massacre of the Latins was a large-scale massacre of Italian-descent Catholics (called " Latins") in Constantinople, the capital of the Byzantine Empire, by the Eastern Orthodox population of the city in April 1182..
The Catholics of Const ...
in 1182. The political excuse for this excursion was in large part due to the exiled Byzantine prince Alexios (the future Emperor
Alexios IV Angelos), who promised the crusaders supplies, money, and the island of
Crete
Crete ( ; , Modern Greek, Modern: , Ancient Greek, Ancient: ) is the largest and most populous of the Greek islands, the List of islands by area, 88th largest island in the world and the List of islands in the Mediterranean#By area, fifth la ...
in return for their help in ousting his uncle Emperor
Alexios III Angelos and freeing his imprisoned father
Isaac II Angelus. In April 1204, after numerous failed negotiations attempting to obtain the promised funds from the Byzantines, the Crusaders
conquered the most powerfully protected city in the world. Stunned at their own success and unsure of what to do next, the leaders adopted a similar track as their forefathers had during the First Crusade. They elected one of their own, Count Baldwin of Flanders as emperor (of what modern historians refer to as the
Latin Empire
The Latin Empire, also referred to as the Latin Empire of Constantinople, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. The Latin Empire was intended to replace the Byzantin ...
) and divided imperial lands into feudal counties.
Latin emperor
The imperial crown was at first offered to
Enrico Dandolo,
Doge of Venice, who refused it. The choice then lay between Baldwin and the nominal leader of the crusade,
Boniface of Montferrat. While Boniface was considered the most probable choice, due to his connections with the Byzantine court, Baldwin was young, gallant, pious, and virtuous, one of the few who interpreted and observed his crusading vows strictly, and the most popular leader in the host. With Venetian support, he was elected on 9 May 1204 and crowned on 16 May in the
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 ...
at a ceremony which closely followed Byzantine practices. During his coronation, Baldwin wore a very rich jewel that had been bought by Byzantine Emperor
Manuel I Komnenos
Manuel I Komnenos (; 28 November 1118 – 24 September 1180), Latinized as Comnenus, also called Porphyrogenitus (; " born in the purple"), was a Byzantine emperor of the 12th century who reigned over a crucial turning point in the history o ...
for 62,000 silver marks. Baldwin's wife Marie, unaware of these events, had sailed to
Acre
The acre ( ) is a Unit of measurement, unit of land area used in the Imperial units, British imperial and the United States customary units#Area, United States customary systems. It is traditionally defined as the area of one Chain (unit), ch ...
. There she learned of her husband's election as emperor, but died in August 1204 before she could join him.

The Latin Empire was organized on
feudal
Feudalism, also known as the feudal system, was a combination of legal, economic, military, cultural, and political customs that flourished in Middle Ages, medieval Europe from the 9th to 15th centuries. Broadly defined, it was a way of struc ...
principles; the emperor was feudal superior of the princes who received portions of the conquered territory: in October 1204 he enfeoffed 600 knights who occupied lands formerly held by Greek nobles. His own special portion consisted of the city of Constantinople, the adjacent regions both on the
Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
an and the
Asia
Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...
tic side, along with some outlying districts, and several islands including
Lemnos,
Lesbos,
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 ...
and
Tenos. The territories still had to be conquered; first of all, it was necessary to break the resistance of the Greeks in
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 ...
and secure
Thessalonica. In this enterprise in the summer of 1204, Baldwin came into collision with Boniface of Montferrat, the rival candidate for the empire, who received a large territory in
Macedonia with the title of
king of Thessalonica.
Boniface hoped to make himself quite independent of the empire and do no homage to his kingdom, and he opposed Baldwin's proposal to march to
Thessalonica. The antagonism between Flemings and
Lombards
The Lombards () or Longobards () were a Germanic peoples, Germanic people who conquered most of the Italian Peninsula between 568 and 774.
The medieval Lombard historian Paul the Deacon wrote in the ''History of the Lombards'' (written betwee ...
aggravated the quarrel. Baldwin insisted on going to Thessalonica; Boniface laid siege to
Adrianople, where Baldwin had established a governor; civil war seemed inevitable. An agreement was effected by the efforts of Dandolo and Count
Louis I of Blois. Boniface received Thessalonica as a
fief
A fief (; ) was a central element in medieval contracts based on feudal law. It consisted of a form of property holding or other rights granted by an overlord to a vassal, who held it in fealty or "in fee" in return for a form of feudal alle ...
from the emperor and was appointed commander of the forces which were to march to the conquest of
Greece
Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
.
During the following winter (1204–1205) the Franks prosecuted conquests in
Bithynia, in which
Henry, Baldwin's brother, took part. But in February the Greeks revolted in
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 ...
, relying on the assistance of
Kaloyan, tsar of
Bulgaria
Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
, whose overtures of alliance had been rejected by the emperor. The garrison of Adrianople was expelled. Baldwin along with Dandolo, the count of Blois, and
Marshal Villehardouin, the
historian
A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human species; as well as the ...
, marched to besiege that city. The Frankish knights were defeated (14 April 1205); the count of Blois was slain, and the emperor was captured by the Bulgarians (see
Battle of Adrianople).
Captivity and death

For some time Baldwin's fate was uncertain, and in the meanwhile Henry, his brother, assumed the regency. Not until the middle of July the following year was it ascertained that he was dead.
The circumstances of Baldwin's death are not exactly known.
There are several accounts of his fate; one being that he was at first treated well as a prisoner by Kaloyan despite refusing to release him at the request of the Pope—another says Kaloyan had Baldwin's hands and feet cut off and thrown in a ditch to die,
while a third account says he refused the advances of the Bulgarian queen who then accused him of rape and had him executed.
The historian
George Acropolites reports that the Tsar had Baldwin's
skull made into a drinking cup, just as had happened to
Nicephorus I almost four hundred years before.
Kaloyan wrote to
Pope Innocent III
Pope Innocent III (; born Lotario dei Conti di Segni; 22 February 1161 – 16 July 1216) was head of the Catholic Church and ruler of the Papal States from 8 January 1198 until his death on 16 July 1216.
Pope Innocent was one of the most power ...
, reporting that Baldwin had died in prison. A tower of the
Tsarevets fortress of the medieval Bulgarian capital,
Veliko Tarnovo, is still called
Baldwin's Tower; supposedly, it was the tower where he was interned.
It was not until July 1206 that the Latins in Constantinople had reliable information that Baldwin was dead. His brother
Henry was crowned emperor in August.
Back in Flanders, however, there seemed to be doubt whether Baldwin was truly dead. In any case, Baldwin's other brother Philip of Namur remained as regent, and eventually, both of Baldwin's daughters,
Joan and
Margaret II, were to rule as countesses of Flanders.
Twenty years later, in 1225, a man appeared in Flanders claiming to be the presumed dead Baldwin. His claim soon became entangled in a series of rebellions and revolts in Flanders against the rule of Baldwin's daughter Jeanne. A number of people who had known Baldwin before the
crusade
The Crusades were a series of religious wars initiated, supported, and at times directed by the Papacy during the Middle Ages. The most prominent of these were the campaigns to the Holy Land aimed at reclaiming Jerusalem and its surrounding t ...
rejected his claim, but he nonetheless attracted many followers from the ranks of the peasantry. Eventually unmasked as a
Burgundian serf named Bertrand of Ray, the false Baldwin was executed in 1226.
Notes
References
* Angold, Michael, ''The Fourth Crusade: Event and Context'', Harlow: Pearson, 2003.
*.
*.
*.
* Harris, Jonathan, ''Byzantium and the Crusades'', London and New York: Bloomsbury, 2nd ed., 2014.
*Harris, Jonathan, 'Collusion with the infidel as a pretext for military action against Byzantium', in ''Clash of Cultures: the Languages of Love and Hate'', ed. S. Lambert and H. Nicholson, Turnhout: Brepols, 2012, pp. 99–117.
*
* Van Tricht, F., ''The Latin Renovatio of Byzantium: The Empire of Constantinople (1204–1228)'', Leiden: Brill, 2011
*.
*
*.
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{{DEFAULTSORT:Baldwin 01 of Constantinople
1172 births
1205 deaths
13th-century Latin emperors of Constantinople
12th-century counts of Flanders
13th-century counts of Flanders
12th-century counts of Hainaut
13th-century counts of Hainaut
House of Hainaut
Christians of the Fourth Crusade
People from Valenciennes
Prisoners who died in Bulgarian detention
13th-century monarchs in Europe
13th-century peers of France
Executed monarchs
People executed by Bulgaria