Date of Birth:
October 3, 1458
Date of Death:
March 4, 1484
He was known for his piety and devotion to the Virgin Mary.
Saint Casimir ruled briefly as King of Poland in his father's absence.
Saint Casimir Jagiellon (Polish: Kazimierz, Lithuanian: Kazimieras) (October 3, 1458 – March 4, 1484) was a royal prince of the Kingdom of Poland and of the Grand Duchy of Lithuania who became a patron saint of Lithuania, Poland, and the young.