Saint Casimir was a prince of the Kingdom of Poland. He rebelled against the riches of the royal court, living a simple life of purity, prayer, and compassion instead. When a teenager he was sent to Hungary to be their new king and lead a war that was a failure. Realizing how futile war was, he returned home a conscientious objector. He returned to prayer, study and helping the poor. He remained celibate his entire life, even under pressure to marry. Casimir died of tuberculosis at 23 and was buried with a copy of his favorite Latin hymn to Mary of whom he was very devoted.