Page "Alphonse, Count of Poitiers" Paragraph 3

Born at Poissy, Alphonse was a son of Louis VIII, King of France and Blanche of Castile.

He was a younger brother of Louis IX of France and an older brother of Charles I of Sicily.

In 1229, his mother, who was regent of France, forced the Treaty of Paris on Raymond VII of Toulouse after his rebellion.

It stipulated that a brother of King Louis was to marry Joan of Toulouse, daughter of Raymond VII of Toulouse, and so in 1237 Alphonse married her.

Since she was Raymond's only child, they became rulers of Toulouse at Raymond's death in 1247.