The Theater of Dionysus is an ancient Greek theater located on the southern slope of the Acropolis in Athens. It is considered one of the earliest and most significant theaters in history, dedicated to Dionysus, the god of wine and theater. Built in the 6th century BCE, it could accommodate around 17,000 spectators and hosted various dramatic performances, including tragedies and comedies. The theater played a crucial role in the development of Greek drama and was the site of the City Dionysia, a festival celebrating Dionysus with theatrical competitions. Notable playwrights like Aeschylus, Sophocles, and Euripides premiered their works here, influencing the evolution of Western theater.