May 4 » Religious reformers John Wycliffe and Jan Hus are condemned as heretics at the Council of Constance.
July 6 » Jan Hus is condemned by the assembly of the council in the cathedral as a heretic and sentenced to be burned at the stake. (See Deaths section.)
August 2 » Thomas Grey is executed for participating in the Southampton Plot.
August 21 » Henry the Navigator leads Portuguese forces to victory over the Marinids at the Battle of Ceuta.
October 25 » Hundred Years' War: Henry V of England, with his lightly armoured infantry and archers, defeats the heavily armoured French cavalry in the Battle of Agincourt.
March 17 » The Battle of Los Alporchones is fought in the context of the Spanish Reconquista between the Emirate of Granada and the combined forces of the Kingdom of Castile and Murcia resulting in a Christian victory.
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 4 » Explorer Christopher Columbus arrives back in Lisbon, Portugal, aboard his ship Niña from his voyage to what are now The Bahamas and other islands in the Caribbean.
July 12 » Hartmann Schedel's Nuremberg Chronicle, one of the best-documented early printed books, is published.
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: Dr. Fermin DeLaFuente, "Fermin de la Fuente III, descendant from King Pelayo Balthes of Asturias", database, Genealogy Online (https://www.genealogieonline.nl/fermin-de-la-fuente-iii/P5171.php : accessed April 30, 2025), "Friedrich /V van OOSTENRIJK III (1415-1493)".
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