Louis IX of France, also known as Saint Louis, was born in 1214 and became king at the age of 12. He is renowned for his strong sense of justice and commitment to the welfare of his people. Louis led two Crusades and worked to strengthen the French monarchy, promoting law and order throughout his kingdom. He was canonized as a saint by the Catholic Church in 1297, recognized for his piety and dedication to Christian values. Louis IX is often celebrated for his efforts in establishing the Saint Louis Cathedral and for his role in the development of French law.