Louis IX of France, also known as Saint Louis, was a popular Capetian monarch who ruled from 1226 to 1270. Some well-known things about him include leading the Seventh Crusade to the Holy Land in 1248-1250 and dying on another Crusade to Tunisia in 1270. He was canonized as a saint in 1297, with August 25 celebrated as his feast day. Louis IX was also known for his devotion to the Catholic faith and strict enforcement of laws against blasphemy. Additionally, he was known for protecting the French clergy from secular leaders and acquiring relics of Christ's passion, such as the Crown of Thorns.