The city of Cairo owes its existence to Babylon fortress, as here is the oldest part of the City and the remains of its oldest structure. This fortress was established by Emperor Trajan, on the Nile eastern bank as a means of protection for the canal that linked the Nile with the Red Sea. On the right side, appears the first tower of the southern gate that lies next to the Coptic Museum.

Whereas on the left, stands the other tower on which Church of Saint George had been founded. Babylon Fortress contains many of the Coptic oldest churches that were built on its walls including Saint Mark Church , the Greek Church of St. George, The Hanging Church and other Coptic churches.