His most notable enterprise began with his arrival with Queen Margaret of Provence on Cyprus.
After this ruler's defeat, a shadowy figure named Jacob, Master of Hungary, sparked the Shepherd's Crusade to recoup this man's losses. His wife often accompanied him on his military campaigns, giving birth to their children John-Tristan, Peter and Blanche over a three year period. This man's death on the African Coast during the Tunisian Crusade meant that his brother Charles I of Sicily, took over that campaign. This man's brother, the Count of Artois, led an ill-fated charge against the forces of Qutuz. His most notable enterprise began with his arrival with Queen Margaret of Provence on Cyprus. He then set sail to defeat Baibars at the Battle of Damietta in 1249. For 10 points, identify this French monarch largely responsible for the eighth and seventh crusades, the only canonized ruler of France.
After this ruler's defeat, a shadowy figure named Jacob, Master of Hungary, sparked the Shepherd's Crusade to recoup this man's losses.
Saint Louis IX [or St. Louis; prompt on "Louis"]