The sacred precinct of Demeter at Priene located at the foot of acropolis consited of a temple, altar, and sacrificial pit. It was erected ca. 350 BC - ca. 300 BC.
See:
- George E. Bean, Aegean Turkey, London Benn Ltd., 1966, p. 206
- https://www.perseus.tufts.edu/hopper/artifact?name=Priene%2C+Sanctuary+of+Demeter+and+Kore&object=Building