The Asklepieion of Epidauros or the Sanctuary of the god Ascelpius was one of the most important and revered Ascelpieia in the ancient world. It flourished as a place of worship and healing from the fifth century B.C. The major festival were the Great Asklepieia which were celebrated every 4 years, 9 days after the Isthmian Games. The worship of Asklepios (Ascelpius) only ended in 426 A.D. when it was outlawed by the Christian Emperor Theodosius II.
This is what the Asclepieia looks like today
The god’s cure was based on the faith of the patient. After the ceremony of purification and the appropriate sacrifices made, the patient went to sleep in the precinct of the sanctuary. The god would appear to the patient personally or in the patient’s dream. He then gave instructions for the patient’s treatment. The therapy involved the epiphany of the god’s appearance as himself or in the form of his sacred creatures which include snakes and dogs.