Dome

Model viewed from the southeast end, the Great Altar center left, the upper agora behind it at center; Pergamon was an ancient Greek city in Asia Minor (now Bergama, Turkey), later part of the Roman Empire. Pergamon (Gr.: "fort" or "stronghold") occupies a steep-sided hill (height 355 m). In Hellenistic times it was ruled by the Attalid dynasty (282-133 BCE), following the death of Alexander the Great. The summit of the hill of Pergamon forms the acropolis proper, with its own massive fortifications. The model shows the Acropolis (the upper city) as it was in the 2nd century CE (under Roman rule). Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 8/1/2012)