House of Flanders

The House of Flanders—also called the Baldwins (Latin: Balduini, French: Baudouinides)—was a medieval ruling family that was founded by Baldwin Iron Arm, son-in-law of Charles the Bald.

House of Flanders
Blason Nord-Pas-De-Calais.svg
Arms of the County of Flanders
Country France
 Holy Roman Empire
Blason Empire Latin de Constantinople.svg Latin Empire
FounderBaldwin Iron Arm
Estate(s)Flanders, Hainaut, Constantinople, Boulogne
Dissolution10 February 1280
Cadet branches
  • House of Hainaut
  • House of Boulogne
  • House of Mons

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 family had a series of setbacks, but in 1191, the family 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, and it also briefly ruled 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.



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