1570 Event King Janos Sigismund Zapolyai signs secret treaty with Maximilian II 1540 Event Turkey recognizes Janos Sigismund Zapolyai as vassal-king of Hungary 1540 Death John I Zapolyai, prince of Transsylvania/king of Hungary, dies 1538 Event King Ferdinand of Austria and King Janos Zapolyai of Hungary sign Peace of Grosswardein 1531 Event Kings Ferdinand of Austria/Janos Zapolyai of Hungary accept each other 1528 Event Hungarian anti-king Janos Zapolyai and Sultan Suleiman signs treaty 1526 Event John I Zapolyai of Transsylvania chosen as king of Hungary
