What is the nationality of the artillery designer who captured the military wall of Tandingburg on April 1453 and 12?

As early as 65438+the beginning of the 5th century, Turks had occupied most of the Balkan Peninsula. From the Aegean Sea to the Danube River, Greeks, Bulgarians, Serbs and other tribes have long been vassal forces of Turks and artillery designers who captured the walls of military Tandingburg.

The fall of Constantinople is the inevitable result of the confrontation between the rising Ottoman and the declining Byzantine, and it is an inevitable tragedy.