Year 1454 (MCDLIV) 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 –… (More on 1454)