Four terraces cut into a hillside overlooking the Kos plain mark the site of this important sanctuary, which was consecrated to Asklepios (Aesculapius), the god of healing and son of Apollo. The sanctuary was built in the late 4C BC to commemorate the skills of Hippocrates and, like Epidauros, it was both a place of worship and a treatment centre served by eminent priest-healers, the Asklepiades, who formed a famous medical school.