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February 4 - In the Thirteen Years' War, the Secret Council of the Prussian Confederacy sends a formal act of disobedience to the Grand Master.

March 6 - Casimir IV of Poland renounces allegiance to the Teutonic Knights

March 27 - Richard Plantagenet, Duke of York becomes Protector for the insane King Henry VI of England

April 18 Treaty of Lodi: Francesco Sforza forms a triple alliance between the duchy of Milan, republic of Florence and kingdom of Naples

September 18 - In the battle of Chojnice, the Polish army is defeated by a smaller but more professional Teutonic army during Thirteen Years' War.

December - King Henry having regained his sanity, the Duke of York is dismissed as Protector

The press of Johannes Gutenberg (at Mainz on the Rhine) produces the first printed documents bearing a date

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March 9 - Amerigo Vespucci, Italian explorer (died 1512)

July 14 - Poliziano, Italian humanist (d. 1494)

September 4 - Henry Stafford, 2nd Duke of Buckingham, English politician (died 1483)

Catherine Cornaro, Queen of Cyprus (died 1510)

Jeanne Hachette, French heroine

Domenico Maria Novara da Ferrara, Italian astronomer (died 1504)

Pinturicchio, Italian painter (died 1513)

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July 20 - King John II of Castile (born 1405)

John Kemp, Archbishop of Canterbury

Robert Wingfield, English politician (born 1403)