[Little Bill]

Unfortunately, the last emperor in Constantinople thought the newfangled “cannon” was unnecessary and too expensive.

The Byzantines had 63 cannon borrowed from the Hungarians at the final siege. The defenders, Byzantines and Genoese, figured that the walls couldn't take the recoil and elected to defend the first wall.

As it turned out the city fell not to cannon but an unguarded Postern Gate.

[SunkenCiv]

Thanks LB!