Some school accounts close the Middle Ages with the fall of the Byzantine capital to the Ottoman Turks. In which year did that fall happen?

Explanation

The eastern empire held on until its capital was stormed in the middle of the fifteenth century, and because that removed the last continuation of Roman rule anywhere, teaching accounts often use the event to close the period. The year of the western deposition is where most mistakes are made, since it marks the end of imperial rule in the west alone and left the eastern empire standing for another thousand years.