Ancient cities tended to... drift. Modern Cairo, for example, started with Memphis, which was abandoned and replaced by a Roman city called (confusingly) Babylo

Ancient cities tended to... drift. Modern Cairo, for example, started with Memphis, which was abandoned and replaced by a Roman city called (confusingly) Babylon, which continued but declined in importance in favor of the Fustat just north of it, etc. I was just at a site in Israel which over two thousand years was first a Hellenistic city, then a Crusader castle, and then an Arab village; at each of these steps, there was a translation sideways by about 500 meters (making their footprints non-overlapping).