Year 1513 (MDXIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events January–June March 9 – Pope Leo X (layman Giovanni di Lorenzo de' Medici) succeeds Pope Julius II, as the 217th pope, despite a strong challenge by Hungarian cardinal Tamás Bakócz. March 27 – Juan Ponce de León becomes the first European definitely known to sight Florida, mistaking it for another island. April 2 – Juan Ponce de León and his expedition become the first Europeans known to visit Florida, landing somewhere on the east coast. April 2 – Juan Garrido (as part of Juan Ponce de León's expedition) becomes the first African known to visit North America, landing somewhere on the east coast of Florida. May – Portuguese explorer Jorge Álvares lands on Lintin Island, in the Pearl River estuary. June 6 – Italian Wars – Battle of Novara: Swiss mercenaries defeat the French under Louis II de la Trémoille, forcing the French to abandon Milan. Duke Massimiliano Sforza is restored. July–December July 22 – Christian II becomes King of Denmark and Norway. August 16 – Battle of Dubica (part of the Hundred Years' Croatian–Ottoman War): Croatian troops under Petar Berislavić, Ban (Viceroy) of Croatia, defeat an Ottoman army under Sanjak-bey Junuz-aga August 16 – Battle of the Spurs (or Battle of Guinegate, part of the War of the League of Cambrai): English and allied troops under Henry VIII defeat French cavalry under Marshal La Palice. August 22 – Thérouanne is captured by Henry VIII of England. September – The dispute between Johann Reuchlin and Johannes Pfefferkorn concerning the Talmud and other Jewish books, is referred to Pope Leo X. September 9 – Battle of Flodden: King James IV of Scotland is defeated and killed by an English army under Thomas Howard, Earl of Surrey. James's son, the Duke of Rothesay, becomes James V, King of Scots. September 25 – Vasco Núñez de Balboa, "silent upon a peak in Darién", first sees what will become known as the Pacific Ocean. October 7 – Battle of La Motta (War of the League of Cambrai): Spanish troops under Ramón de Cardona and Fernando d'Avalos decisively defeat those of the Republic of Venice under Bartolomeo d'Alviano on Venetian territory. December Louis XII of France makes peace with the Pope and Spain. A major landslide occurs near Bellinzona. Undated Appenzell becomes a member