Dodona is regarded as the oldest Hellenic oracle, possibly dating to the second millennium B.C. second in fame only to Delphi. The Naia Festival (famous Panhellenic athletic and drama contests) was held here every 4 years in honour of Zeus.   Here lies the largest and best preserved theatre on the Greek mainland, the great Theatre of Dodona, built approximately in the early 3rd B.C. Once seated 17,000 in its heyday, it is now used for summer presentations of ancient Greek drama. #Dodona…