The sanctuary of Asklepios developed in a wooded Peloponnesian valley connected with the city of Epidaurus. Earlier worship of Apollo Maleatas on a nearby hill preceded the rise of Asklepios, a divine healer whose cult became internationally influential from the sixth century BCE. Sick and injured pilgrims came seeking cure through ritual, rest, diet, bathing, sacrifice, and consultation. They slept in the abaton, hoping the god would appear in dreams and prescribe or perform healing. Inscriptions recording cures joined gratitude, institutional promotion, and religious testimony within the sanctuary.

Prosperity in the fourth century BCE produced the principal sacred buildings. The Temple of Asklepios housed the cult image; the circular tholos displayed exceptionally refined architecture and an enigmatic underground system; stoas, baths, dining facilities, lodgings, and administrative structures served visitors. Healing was not separated from music, athletics, and drama. Festivals honoring Asklepios included competitions that expressed bodily and civic well-being. The sanctuary accumulated dedications and operated through priests and attendants whose practices combined observation and practical care with expectations of divine intervention.

The theater, traditionally attributed to Polykleitos the Younger, was built in the later fourth century BCE and enlarged under Roman rule. Its limestone seating uses the natural slope around a circular orchestra, with carefully proportioned sightlines and sound distribution. Modern claims that a single acoustic secret makes every whisper audible everywhere exaggerate a sophisticated but variable performance environment. The stage building changed in antiquity and later disappeared substantially. The cavea's survival gives an unusually complete impression, yet the theater evolved and never existed as the bare, timeless semicircle familiar from modern photographs.

Roman patronage maintained and altered the sanctuary, but raids, earthquakes, Christianization, and economic change brought decline. Later people reused stone and vegetation covered ruins. Systematic Greek excavation began in 1881 under Panagiotis Kavvadias. Archaeologists exposed buildings and conserved finds, while restoration reset selected columns and architectural members through anastylosis. The theater returned to dramatic performance in the twentieth century and became central to the modern Epidaurus Festival. Live use renews its ancient function but introduces lighting, staging, crowds, and wear that require careful heritage controls.

UNESCO inscribed the Sanctuary of Asklepios at Epidaurus in 1988. The Greek Ministry of Culture manages the archaeological zone, museum, monuments, and performance use. The theater retains extensive ancient seating with repaired and restored sections; many sanctuary buildings survive mainly as foundations, while selected elements of the tholos and temples have been re-erected. Ticketed access connects healing spaces with athletic and theatrical facilities. Epidaurus is valuable not merely for acoustics but as an integrated record of Greek medicine, religion, architecture, community, and art, interpreted through continuing excavation and controlled modern performance.