Answer:
The primary patron of theater was Dionysus, god of wine, fertility, and sexuality.
Explanation:
We might be tempted to choose Apollo, since he is described as the god of music and art. Yet, it was Dionysus who was originally the patron of theater in Ancient Greece. The festivals which held major importance in his cult functioned as a driving force for the development of theater. As a matter of fact, a famous archaeological site in Greece is the Theater of Dionysus, originally built as part of a sanctuary for the god. The Theater could sit up to 17,000 people.