House of Flanders

House of Flanders

Arms of the County of Flanders
Estates Flanders, Hainaut, Constantinople, Boulogne
Founded 863
Founder Baldwin I, Count of Flanders
Final ruler Margaret II, Countess of Flanders
Dissolution 1280
Ethnicity Flemish, French
Cadet branches
  • House of Hainaut
  • House of Boulogne

The House of Flanders - also called the Baldwins (Lat. Balduini, Fr. Baudouinides) - was founded by Baldwin I Iron Arm, husband of Judith, daughter of Charles the Bald.

From 1051, the House of Flanders also reigned over the County of Hainaut, with Baldwin I of Hainaut. In 1119, on the death of Baldwin VII, the House of Flanders ceased to rule in Flanders. But in 1191, the House of Flanders recovered the title of Count of Flanders with Baldwin VIII (Baldwin V of Hainaut). The dynasty established the Latin Empire of Constantinople during the Fourth Crusade. It also ruled briefly the County of Namur (1188-1212). The House of Flanders became extinct in 1280 with the death of Margaret II.

A cadet branch, the House of Boulogne, ruled over the County of Boulogne. Members of this house joined the First Crusade, established the Kingdom of Jerusalem, and produced its first kings.

[1] note first Kings of Jerusalem since the Davidic line of kings.



Arms of the House of Flanders
Count of Flanders (attributed)
Count of Flanders
Count of Hainaut (Ancient)
Latin Emperor of Constantinople
Arms of the House of Boulogne
Count of Boulogne
King of Jerusalem


  1. Holy Bible
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