Pergamon
Pergamon lies on the north edge of the Caicus plain in the historic region of Mysia in the northwest of Turkey. The Caicus river breaks through the surrounding mountains and hills at this point and flows in a wide arc to the southwest. At the foot of the mountain range to the north, between the rivers Selinus and Cetius, there is the massif of Pergamon which rises 335 metres above sea level. The site is only 26 km from the sea, but the Caicus plain is not open to the sea, since the way is blocked by the Karadağ massif. As a result, the area has a strongly inland character. In Hellenistic times, the town of Elaia at the mouth of the Caicus served as the port of Pergamon. The climate is Mediterranean with a dry period from May to August, as is common along the west coast of Asia Minor.
Pergamon
The 80 m long and 55 m wide 'Lower Agora' was built under Eumenes II and was not significantly altered until Late Antiquity. As with the Upper Agora, the rectangular form of the agora was adapted to the steep terrain. The construction consisted in total of three levels. Of these the Upper Level and the 'Main Level' opened onto a central courtyard. On the lower level there were rooms only on the south and east sides because of the slope of the land, which led through a colonnade to the exterior of the space. The whole market area extended over two levels with a large columned hall in the centre, which contained small shop spaces and miscellaneous rooms.