The Fortifications of Pergamon

 

These are the fortifications at the entrance to the acropolis of Pergamon. On the left are the ruins of the tower built
from isodomic ashlar -- one of the few remaining examples of the fortifications built in the early 2nd century BC by Eumenes II. The walls on the right of the tower were made from roughly worked stones alternating with broken tiles using mortar; these fortifications date back to the Byzantine period. The picture has been outlined in ink to make the picture clearer against a light colored sky and background.