Year 1453 was a common year starting on Monday (link will display the full calendar) of the Julian calendar. Events of 1453 April - Therapia and Studius are taken by the Ottomans in preparation for the assault on Constantinople, as are the Princes' Islands, by the Ottoman fleet under Admiral Baltoghlu. April 2-May 29 - Siege and Fall of Constantinople (now Istanbul): The Ottoman Sultan Mehmed II the Conqueror ends the Byzantine Empire by capturing the city. May-June: Epibatos and Selymbria a… (More on 1453)