The old city walls of Durrës preserve sections from the Byzantine period, built in the 5th and 6th centuries on the foundations of even older Hellenistic and Roman fortifications. Stretches of the wall walk through the modern city in a slightly surreal way — a fragment of ancient masonry rising between apartment blocks and car parks.
The Venetian tower at the western end of the wall circuit is the best-preserved individual element. It is a squat, round tower with thick walls and a dark history as an Ottoman and later a communist prison. It now functions as a small museum. Walking the accessible sections of the wall, especially in the early morning, gives a good sense of the old city's layout.