John Capistrano (1386–1456)

Franciscan preacher and defender of Belgrade. John of Capistrano, OFM was an Italian Franciscan friar and Catholic priest from the 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.