February 15 » While on board the Niña, Christopher Columbus writes an open letter (widely distributed upon his return to Portugal) describing his discoveries and the unexpected items he came across in the New World.
March 15 » Christopher Columbus returns to Spain after his first trip to the Americas.
September 9 » Battle of Krbava Field, a decisive defeat of Croats in Croatian struggle against the invasion by the Ottoman Empire.
September 26 » Pope Alexander VI issues the papal bull Dudum siquidem to the Spanish, extending the grant of new lands he made them in Inter caetera.
November 18 » Christopher Columbus first sights the island now known as Puerto Rico.
November 19 » Christopher Columbus goes ashore on an island called Borinquen he first saw the day before. He names it San Juan Bautista (later renamed again Puerto Rico).
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/P37667.php : accessed April 30, 2025), "Katharina of HABSBURG (1423-1493)".
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