Isabelle de France

Isabelle of France (March 1225 – 23 February 1270) was a French princess and daughter of Louis VIII of France and Blanche of Castile. She was a younger sister of King Louis IX of France (Saint Louis) and of Alfonso, Count of Poitiers, and an older sister of King Charles I of Sicily. In 1256, she founded the nunnery of Longchamp in part of the Forest of Rouvray (now called the Bois de Boulogne), west of Paris. Isabelle consecrated her virginity and her entire life to God alone. She is honored as a saint by the Franciscan Order. Her feast day is 22 February.