John of Capistrano ("Italian": San Giovanni da Capestrano, "Hungarian": Kapisztrán János, "Polish": Jan Kapistran, "Croatian": Ivan Kapistran", Serbian": Јован Капистран, Jovan Kapistran) (24 June 1386 – 23 October 1456) was a Franciscan friar and Catholic priest from the Italian town of Capestrano, Abruzzo. 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.