Drama developed from the songs and dances performed in Athens at the festival of Dionysus, the god of wine. The songs in the god's honour were sung by a group of 12 to 15 men, called the chorus. Then an actor was included, who talked with the leader of the chorus. As more actors took part, the words and action became more impotrant and proper plays were written. Plays were performed in theatres in the open air. Seats for the audience were cut into the slope of a hillside. They were made of wood at first, but were later replaced by stone. The philosopher Plato tells us that in some theatres there was room up to 30,000 people. Performances lasted all day, with several plays in a row.
Plays were divided into tragedies and comedies. The judges awarded ivy wreaths to the authors of the best tragedy and comedy.