King Alfonso V Apr 2 Alfonso V succeeds his father as King of Aragon King Alfonso V of Aragon May 7 Monk Nicolaas Serrurier arrested because of heresy at Tournay May 30 Jerome of Prague burned at the stake for heresy by church Council of Constance 1415 Historical Events by Year 1417 Medieval Popes Gregory I Gregory XIII Julius II Julius III Leo X Pius V
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V