Wall of Nicea

A view of the exterior of the wall that surrounded Nicea/Iznik.  Notice one of the original 114 towers that were built into the city wall.

The ancient city is contained within the city walls that were built in the later first century A.D. and later rebuilt after the Goth invasion in A.D. 268.  These walls form the shape of a pentagon with its base to the south and its apex to the north.