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 sanctuary was entered through a Propylon from the east, which led to a courtyard surrounded by stoas on three sides. In the centre of the western half of this courtyard, stood the Ionic temple of Demeter, a straightforward Antae temple, measuring 6.45 x 12.7 metres, with a porch in the Corinthian order which was added in the time of Antoninus Pius. The rest of the structure was of Hellenistic date, built in local marble and had a marble frieze decorated with bucrania. About 9.5 metres in front of the east-facing building, there was an altar, which was 7 metres long and 2.3 metres wide. The temple and the altar were built for Demeter by Philetaerus, his brother Eumenes, and their mother Boa.