Constantinople Walls are city walls built around Eastern Istanbul during the time of Istanbul. The walls around Istanbul have been built in the 5th century, and have been overturned four times with demolitions and reconstructions. It's after the final construction of A.D 408.II. During the time of Theodosius (408-450), the city walls of Istanbul stretched along the shores of the Golden Horn from Ayvalsa to Ayvansaray along the coast of Marmara along Yedikule, from Yedikule to Topkapi, and from Topkapi to Ayvansaray.
The length of the walls is 22 km. The walls of the Golden Horn are 5.5 km, the land walls 7.5 km and the Marmara walls 9 km.
The road walls consist of three parts: the moat, the outer wall, the inner wall. The ditches have become agricultural land today. There are 96 bastions in the cracked state, many of which are destroyed, adjacent to the land and on the land walls side by side at intervals of 50 m. These bastions are 10 m above the walls of the city walls, mostly square and 25 m high. There are windows, vaults, doors. There are doors and stairs between inner walls and outer walls. Inside walls and bastions were used stone and bricks.
The sea walls were similar in architecture to the walls of Theodosius, but they were built in a simpler structure.
The sea walls, which were lower than the land walls, were in a single wall protecting the interior of the harbors. The Golden Horn walls, Emperor III at the entrance of Golden Horn. It was protected by a heavy chain supported by floating barrels built by Leon..