Some of the oldest ruins visible today are the walls of Constantinople, built in the V century by Emperor Theodosius II. Most of the western side still stands, however not much is being done for preservation: there are no steel supports to hold the cracked pieces together and we saw people climbing to the top of them for drinks with cool sights. The access was unrestricted.

There are at least two large pieces of aqueduct remaining today, and they are of the same age as the walls.

Water was stored in underground cisterns. At least three are preserved. While visiting, the feeling was very intense. Better than any video game ever imagined! Absolutely remarkable!