Walls
The wall on the east side has foundations that are thought to date from about 600 BC, and indicate Illyrian settlement. The wall here was about 3m thick. In the 4th century BC, the city is thought to have spread to the south and south-west of the first acropolis. Re-entering the central complex of buildings, you pass through the base of the entrance tower to the old upper city, and a monument to Apollo. Climb up the slope to the south side of the odeon, and immediately the massive masonry of the perimeter walls of the site are in front of you. A walk around the walls in this direction towards the church of St Mary is a rewarding experience, as they are on the whole in a well- preserved state and there is a wonderful view over the valley east of the odeon.
After a short walk to a corner tower, turn towards the church and follow the walls south. In total they are about 4km in length and were constructed in different stages. The first large-scale fortification of the city took place in the 4th century BC and with later construction in the 3rd century and in the time of Roman monarchs.