People/Papacy and Western Europe

c. 1150–1207 · Nominal leader of the Fourth Crusade

Boniface of Montferrat

Aristocratic leader of the Fourth Crusade and founder of the Kingdom of Thessalonica after 1204.

No verified depiction added

BIOGRAPHICAL DOSSIER

Life and historical role

01

Life and political setting

Boniface belonged to the marquisal house of Montferrat. His brothers Conrad and Renier had established strong connections in the eastern Mediterranean and at the Byzantine court. After the death of Theobald of Champagne, Boniface was selected as the aristocratic leader of the Fourth Crusade.

02

Role in the Crusades

He was prominent in the transport agreement with Venice, the attack on Zara and the plan to place Alexios IV on the Byzantine throne. After Constantinople fell in 1204 Boniface was not chosen emperor. He instead established a kingdom centred on Thessalonica and Macedonia and was killed in conflict with Bulgarian forces in 1207.

Method note

Biographical information is linked to the sources shown on the page and to the connected event records. Disputed dates are given as approximate, gaps are not filled by conjecture, and later literary or visual depictions are not treated as contemporary portraits.

CONTEXTUAL READING

Related cases

24 November 1202 · Zara / Zadar

Sack of Zara

Unable to pay its transport debt to Venice, the army of the Fourth Crusade besieged the Christian city of Zara (Zadar) on the Adriatic at Doge Enrico Dandolo's suggestion. The city surrendered on 24 November 1202 and was sacked; the pope excommunicated those who took part in the attack.

Open record →17 July 1203 · Constantinople

First capture of Constantinople

In July 1203 the army of the Fourth Crusade and the Venetian fleet took the tower of Galata and broke the chain across the Golden Horn. After the assault of 17 July, Emperor Alexios III fled; the blinded former emperor Isaac II and his son Alexios IV were placed on the throne.

Open record →12–15 April 1204 · Constantinople

Capture and sack of Constantinople

On 12 April 1204 the army of the Fourth Crusade and the Venetians attacked a second time and took Constantinople. In three days of looting the city's churches, palaces and houses were plundered; many works of art and holy relics were carried off to the West.

Open record →