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… (More on 1454)