The Imperial District was one of the four major districts within Constantinople during the Renaissance. It was an area of towering marble buildings, majestic mosques and opulent citizenry. It is home to the Hagia Sophia.
It has also been included as a multiplayer map with the Mediterranean Traveler Map Pack downloadable content for Assassin's Creed: Revelations.
Gallery
Hagia Sophia.
Concept art of market in Imperial district.
Imperial District of Constantinople - Multiplayer
Reference