Sculpture of a theater mask dating from the Hellenistic period. Currently on display in Room 30 of the National Archaeological Museum in Athens, Nr 3373. Source: http://commons.wikimedia.org/wiki/File:Theatre_mask_NAMA_3373_%28DerHexer%29.JPG, License: http://commons.wikimedia.org/wiki/Commons:GNU_Free_Documentation_License_1.2