The Theater of Dionysus The Theater of Dionysus was Europe's first theater, and stood immediately below the Parthenon in Athens, Greece. It was originally built in the late 5th century B.C. The theater was an outdoor auditorium in the shape of a great semicircle on the slope of the Acropolis, with rows of seats on which about eighteen thousand spectators could comfortably seat. The front rows consisted of marble chairs, and were the only seats in the theater that had a back support. The priests of Dionysus and the chief magistrates of Athens reserved these rows. Priests claimed 50 of the 67 front row seats, then came the officials, the guest