1249    Andrew of Longjumeau is dispatched by Louis IX of France as his ambassador to meet with Mongol Khagan of the Mongol Empire.

1250    The Seventh Crusade is defeated in Egypt, Louis IX of France is captured.

1259    Kings Louis IX of France and Henry III of England agree to the Treaty of Paris, in which Henry renounces his claims to French-controlled territory on continental Europe (including Normandy) in exchange for Louis withdrawing his support for English rebels.

1260    The spectacular Cathedral of Chartres is dedicated in the presence of King Louis IX of France; the cathedral is now a UNESCO World Heritage Site.

1269    King Louis IX of France orders all Jews found in public without an identifying yellow badge to be fined ten livres of silver.

1270    The Eighth Crusade and siege of Tunis end by an agreement between Charles I of Sicily (brother to King Louis IX of France, who had died months earlier) and the sultan of Tunis.