Year 1473 (MCDLXXIII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. Events January–December February 12 – The first complete Inside edition of Avicenna's The Canon of Medicine (Latin translation) is published in Milan. August 11 – Battle of Otlukbeli: Ottoman Sultan Mehmed II defeats the White Sheep Turkmens, led by Uzun Hasan. Date unknown Stephen the Great of Moldavia refuses to pay tribute to the Ottomans. This will attract an Ottoman invasion resulting in 1475 in the greatest defeat of the Ottomans so far. Axayacatl, Aztec ruler of Tenochtitlan, invades the territory of the neighboring Aztec city of Tlatelolco. The ruler of Tlatelolco is killed and replaced by a military governor; Tlatelolco loses its independence. Possible discovery of the island of "Bacalao" (possibly Newfoundland off North America) by Didrik Pining and João Vaz Corte-Real. The city walls and defensive moat are built in Celje, Slovenia. Almanach cracoviense ad annum 1474, an astronomical wall calendar, is published in Kraków, the oldest known printing in Poland. Florentine physician Marsilio Ficino becomes a Catholic priest. Possible date – Recuyell of the Historyes of Troye is the first book to be printed in English, by William Caxton, in Bruges. Births February 19 – Nicolaus Copernicus, Polish astronomer and mathematician (d. 1543) February 25 – Al-Mutawakkil Yahya Sharaf ad-Din, Imam of the Zaidi state in Yemen (d. 1555) March 3 – Asakura Sadakage, 9th head of the Asakura clan (d. 1512) March 14 – Reinhard IV, Count of Hanau-Münzenberg (1500–1512) (d. 1512) March 16 – Henry IV, Duke of Saxony (1539–1541) (d. 1541) March 17 – King James IV of Scotland, King of Scots from 11 June 1488 to his death (d. 1513) April 2 – John Corvinus, Hungarian noble (d. 1504) July 4 – Matilda of Hesse, German noblewoman (d. 1505) July 6 – James III of Cyprus, son of James II of Cyprus and Catherine Cornaro, king of Cyprus (d. 1474) July – Maddalena de' Medici, Italian noble (d. 1528) August 14 – Margaret Pole, 8th Countess of Salisbury (d. 1541) August 17 – Richard, Duke of York, one of the Princes in the Tower (d. 1483) August 25 – Margaret of Münsterberg, Duchess consort and regent of Anhalt (d. 1530) September 2 – Ercole Strozzi, Italian poet (d. 1508) September 23 – Thomas Lovett III, High Sheriff of Northamptonshire (d. 1542) September 24