Dec 13 John III succeeds his father as King of Portugal and the Algarves, at age 19; reigns for 36 years, until his death in 1557 Dec 29 Isabella of Poland and King Ferdinand of Austria sign Treaty of Gyalu Nov 1541 Historical Events by Year Jan 1542 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