Four years later St. Dominic had unfortunately died from an illness possibly pleurisy, in 1857. He died in Castelnuovo Don Bosco, Italy. His feast day is March 9th. He was canonized a saint on June 12, 1954, by Pope Pius XII. He became a saint because "A teenager such as Dominic, who bravely struggled to keep his innocence from Baptism to the end of his life, is really a saint," said Pope St. Pius X. http://www.catholic.org/ Pope St. Pius XII. canonized St. Dominic Savio. He is the patron saint of the falsely accused.