In addition to its strong walls, which of the following protected Constantinople from attacks?

a. Large deserts on all sides

b. Buffer neighborhoods of settled Huns

c. The sea on three sides

d. An army corps surrounding the walls

The correct answer is

c. The sea on three sides

Constantinople can only be attacked from one side. This causes armies to get caught in passages towards Constantinople and to not be able to sack the city since they don't have to think about the city being besieged fro mall sides. It is located on an excellent piece of land for defending and being like a turtle.