The theatre of ancient Greece, or ancient Greek drama, is a theatrical culture that flourished in ancient Greece between c. 550 and c. 220 BC. The city-state of Athens was its centre, where it was institutionalised as part of a festival called the Dionysia, which honoured the god Dionysus.
The performance space was a simple semi-circular space, the orchestra, where the chorus danced and sang. The orchestra, which had an average diameter of 78 feet, was situated on a flattened terrace at the foot of a hill, the slope of which produced a natural theatron, literally "watching place". Later, the term "theatre" came to be applied to the whole area of theatron, orchestra, and skené. The choragos was the head chorus member who could enter the story as a character able to interact with the characters of a play.