The "Cave of the Seven Sleepers" on the slopes of Mount Pion (Mount Coelian) near Ephesus (near modern Selçuk in Turkey) is an early Christian catacomb necropolis and place of worshipp. The excavation several hundred graves dated to the 5th and 6th centuries have been unearthed. Inscriptions dedicated to the Seven Sleepers were found on the walls and in the graves.
Sources:
- Ekrem Akurgal, Ancient Civilisations and Ruins of Turkey: From Prehistoric Times Until the End of the Roman Empire, II ed., Istanbul 1970, p. 144
- Andre Grabar, L'Âge d'or de Justinien, de la mort de Théodose à l'Islam, Paris 1966
- Francesco D´Andria, The Sanctuary of St Philip in Hierapolis and the tombs of saints in Anatolian cities, in J.R. BRANDT, E. HAGELBERG, G. BIØRNSTAD, S. AHRENS, Lıfe and Death in Asia Minor in Hellenistic, Roman and Byzantine Times. Studies in Archaeology and Bioarchaeology, Oxford and Philadelphia, 2016
- https://www.britannica.com/topic/Seven-Sleepers-of-Ephesus