John of Capistrano was a 15th-century Italian Franciscan friar and renowned preacher. Born in Capestrano, he initially studied law at the University of Perugia and served as the governor of the city before turning to theology during a period of imprisonment. He eventually joined the Order of Friars Minor, seeking a life of strict asceticism. Known for his powerful oratory, he traveled extensively across central and northern Europe, drawing massive crowds in public squares to hear his sermons on doctrine and repentance.