The most controversial figure in fall of Constantinople: Giovanni Giustiniani

Siege of Constantinople : Source-https://weaponsandwarfare.com/2016/12/01/constantinople-prepares-for-siege/

The massive Ottoman army is hitting the walls of Constantinople, the Byzantine Empire’s capitol, with its entire force.

The army inside the city is a mix of Byzantines, Venetians, and Genoese mercenaries. The civilian population is holding on during the siege hoping for a miracle .