Further north, before the main area of habitation, there are the grandiose fortifications for the defense of the acropolis. They are paralleled by a long gallery (originally covered) with numerous vaulted passages, followed by a deep defensive ditch crossed by a bridge, with three semicircular towers at west, north, and east. Around the outside of the north tower (which had a weapons’ store at its base) are the entrances to the east-west trench, with passages in both the walls. Only a small part of the fortifications belong to the old city – they are mostly from Hermocrates’ reconstruction and successive repairs in the fourth and third centuries. The fact that architectural elements were recycled into it demonstrates that some of the temples were already abandoned in 409 BC.