January 8 » The papal bull Romanus Pontifex awards the Kingdom of Portugal exclusive trade and colonization rights to all of Africa south of Cape Bojador.
February 4 » In the Thirteen Years' War, the Secret Council of the Prussian Confederation sends a formal act of disobedience to the Grand Master.
March 6 » Thirteen Years' War: Delegates of the Prussian Confederation pledge allegiance to King Casimir IV of Poland who agrees to commit his forces in aiding the Confederation's struggle for independence from the Teutonic Knights.
April 9 » The Treaty of Lodi is signed, establishing a balance of power among northern Italian city-states for almost 50 years.
September 18 » Thirteen Years' War: In the Battle of Chojnice, the Polish army is defeated by the Teutonic knights.
January 20 » Christian II is forced to abdicate as King of Denmark and Norway.
June 6 » Swedish regent Gustav Vasa is elected King of Sweden and, marking a symbolic end to the Kalmar Union, 6 June is designated the country's national day.
June 9 » The Parisian Faculty of Theology fines Simon de Colines for publishing the Biblical commentary Commentarii initiatorii in quatuor Evangelia by Jacques Lefèvre d'Étaples.
June 10 » Copenhagen is surrounded by the army of Frederick I of Denmark, as the city will not recognise him as the successor of Christian II of Denmark.
July 1 » Jan van Essen and Hendrik Vos become the first Lutheran martyrs, burned at the stake by Roman Catholic authorities in Brussels.
When copying data from this family tree, please include a reference to the origin: Peter John Oswald, "Pop Oswald Tree", database, Genealogy Online (https://www.genealogieonline.nl/pop-oswald-tree/P37711.php : accessed April 30, 2025), "Bogislaw X of POMERANIA (1454-1523)".
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