Saint John of Capistrano (Italian: Giovanni da Capistrano, Hungarian: Kapisztrán János, Polish: Jan Kapistran, Croatian: Ivan Kapistran, Serbian: Jovan Kapistran) (June 24, 1386 – October 23, 1456) was a Franciscan friar and Catholic priest from Italy. Famous as a preacher, theologian, and inquisitor, he earned himself the nickname 'the Soldier Saint' when in 1456 at age 70 he led a crusade against the invading Ottoman Empire at the siege of Belgrade with the Hungarian military commander John Hunyadi.
Elevated to sainthood, he is the patron saint of jurists and military chaplains, as well as the namesake of the Franciscan missions San Juan Capistrano in Southern California and San Juan Capistrano in San Antonio, Texas.
As was the custom of this time, John is denoted by the village of Capestrano, in the Diocese of Sulmona, in the Abruzzi region, Kingdom of Naples. His father had come to Italy with the Angevin court of Louis I of Anjou, titular King of Naples. He studied law at the University of Perugia .