The sanctuary of Zeus Soter was erected ca 371 BC. The three cult statues, depicting Zeus Soter, Artemis Soteira and Megalopolis, are described by Pausanias, who attributes them to the sculptors Kephisodotos and Xenophon - Quite near to this portico, on the east, is a sanctuary of Zeus, surnamed Saviour. It is adorned with pillars round it. Zeus is seated on a throne, and by his side stand Megalopolis on the right and an image of Artemis Saviour on the left. These are of Pentelic marble and were made by the Athenians Cephisodotus and Xenophon1.
- Antonio Corso, The triad of Zeus Soter, Artemis Soteira and Megalopolis at Megalopolis, Papers from the third international seminar on Ancient Arcadia, held at the Norwegian Institute at Athens, 7-10 May 2002, The Norwegian Institute at Athens 2005, pp. 225-234 - https://digitalt.uib.no/bitstream/handle/1956.2/3029/The%20Triad%20of%20Zeus%20Soter_Corso.pdf?sequence=1
- Pausanias Description of Greece with an English Translation by W.H.S. Jones, Litt.D., and H.A. Ormerod, M.A., in 4 Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1918.
- ↑Pausanias. VIII. 30.10