Rhetorical education – specifically, the advent of the progymnasmata, or preliminary rhetorical exercises – taught students how to be Greek, and it appears to have been the root of many Hellenistic innovations in both art and literature. The wealthy and elite backgrounds of some Greek artists enabled them to be well educated, and their intellectualism aided their adult pursuits in oratory, teaching, and scholarship, not to mention art. Kings and courtiers, too, received Greek rhetorical educations, which allowed them to appreciate the rhetorically informed art in the courts. The courts also played a role in Hellenistic artistic production by drawing Greek artists around the ancient Mediterranean. The result of all this seems to be a standardization of Greek art that is analogous to a linguistic koine.

Today Hellenistic art is celebrated for its innovation. To get a sense of how it differs from the Greek art of previous eras, we only need to compare two well-known artworks that are separated by centuries but united in medium: the Classical frieze from the Parthenon in Athens (Fig. 1.1) and the Hellenistic Telephos Frieze from the Great Altar at Pergamon (Fig. 1.2).