Apart from a summary report by the archeaologist P. Kavvadias
in his general book dedicated to the results of the excavations at Epidaurus,
the theater was thoroughly measured and studied by Armin von Gerkan and
Wolfgang Mueller-Wiener of the German Archaeological Institute. The results
of their studies were published in "Das Theater von Epidauros"
The present state of the theater is the result of extensive restoration work carried out during the 20th century. Restoration included complete rebuilding of the collapsed retaining walls, and the gateways as well as reconstruction of the lateral seat wedges.
Since the beginning of the current decade the Greek Ministry of Culture has undertaken additional restoration work focusing on the auditorium and the gateways. At the same time concerted efforts are made to enhance the protection of the theater against overworning, by regulating the access of visitors and its use during the summer festivals. After World War II the Greek Tourist Organization initiated a Summer Festival of Greek Drama, which for years has been a major cultural event.
Lately the whole site of the Sanctuary of Asklepios at Epidaurus, including the theater, was enlisted in the List of International Cultural Heritage of UNESCO.