Year 1454 was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.

Events of 1454

• 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 - 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 9 - Treaty of Lodi: Francesco Sforza forms a triple alliance between the duchy of Milan, the republic of Florence and kingdom of Naples.
• September 18 - Battle of Chojnice: The Polish army is defeated by a smaller but more professional Teutonic army during the 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.
• Isaac Sarfati sends a circular letter to Rhineland, Swabia, Moravia and Hungary, praising the happy conditions of the Jews under the crescent in contrast to the "great torture chamber" under the cross and urging them to come to Turkey.
• The standardization and proper designation of the respective values to each of the following units: the ale gallons (ale), litres (ale), ale gallons (beer), and litres (beer). The imperial British Empire was never the same.

Births

• March 9 - Amerigo Vespucci, Italian explorer (d. 1512)
• July 14 - Poliziano, Italian humanist (d. 1494)
• September 4 - Henry Stafford, 2nd Duke of Buckingham, English politician (d. 1483)
• Date unknown:
  • Catherine Cornaro, Queen of Cyprus (d. 1510)
  • Domenico Maria Novara da Ferrara, Italian astronomer (d. 1504)
  • Pinturicchio, Italian painter (d. 1513)
  • Ch'oe Pu, Korean official and venturer to China (d. 1504)

Deaths

• March 22 - John Kemp, Archbishop of Canterbury
• July 20 - King John II of Castile (b. 1405)
• Date unknown:
  • Chiara Zorzi, regent of Athens
  • William Turnbull, Bishop of Glasgow
  • Robert Wingfield, English politician (b. 1403)

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