Located on the northern slopes of Mount Pion, near Ephesus, The Grotto of Seven Sleepers has been discovered by both Christians and Moslems with a growing interest. According to the Christian legend seven young men were walled in during the reign of Decius (250) and yet were seen alive in the streets of Ephesus during the reign of Theodosius II some years after the Council of Ephesus (431). In the Koran, the sleepers slept 309 years. A church has been built above this Grotto by Christians.
