A temple-shaped funerary building of the 2d-3d century AD.
It is the most peculiar and interesting monument of Sikinos.
Located in the wilderness of the mainland, Episkopi temple is surrounded by a complex of Byzantine chapels, cells, ancient ruins, wall stones and fragments of marble sculptures.
Enigmatic and silent, it was initially thought to be a temple of Pythios Apollo but the strange building with the underground vaulted crypts has been identified as belonging to the type of the roman mausoleums, burial monuments of the 2d-3d AD.
Anyhow, around 17th century the building was transformed into a domed christian church.
The uniqueness of Episkopi lies in the fact that it preserves the basic characteristics of both its Roman and its Post-byzantine past and is a standing monument of the site's long history.