http://agathe.gr/democracy/theater.html
Theater Western drama was an Athenian invention which developed late in the 6th century B.C. out of the festivals celebrated in honor of the god Dionysos. Originally held in the Agora, the plays were soon ... ("Xenophon," Constitution of the Athenians 2.18) Terracotta mask of the Leading Slave, about 250 B.C. ... The hair has been combed back from the forehead, and a short beard frames the mouth. The mask is life-size but was probably not used as a mask but as a votive gift to be hung on a wall. ... A male figure wearing the mask of a slave sits at the foot of the couch.