text: This monarch was the first to mint a gold coin called the ecu d'or, and commissioned Vincent of Beauvais to write the encyclopedia Speculum majus.
full_question: This monarch was the first to mint a gold coin called the ecu d'or, and commissioned Vincent of Beauvais to write the encyclopedia Speculum majus. This king granted the appanage of Poitou to his brother, Alphonse, with whom he fought and won the Saintonge War and the Battle of Taillebourg against England. Various legends about this husband of Marguerite of Provence were told by his biographer, Jean de Joinville. This king allowed his vassal, Henry (*) III of England, to hold on to English territories in Aquitaine. This Capetian king's mother, Blanche of Castile, served as regent while he traipsed around North Africa leading the Seventh Crusade. He ultimately died in Tunisia during the Eighth Crusade. For 10 points, name this only French king to be canonized.
first_sentence: This monarch was the first to mint a gold coin called the ecu d'or, and commissioned Vincent of Beauvais to write the encyclopedia Speculum majus.
raw_answer: Louis IX [or Saint Louis; prompt on Louis]