Theatre of Dionysus is an ancient Greek theatre located on the southern slope of the Acropolis in Athens. It was dedicated to Dionysus, the god of wine and fertility, and is considered one of the earliest and most significant theatres in history. Built in the 6th century BCE, it could accommodate around 17,000 spectators and hosted various performances, including tragedies and comedies. The theatre played a crucial role in the development of Greek drama and was the site of the annual City Dionysia festival, where playwrights competed for prizes. Its design influenced many later theatres, and remnants of the structure can still be seen today, highlighting its historical importance.