The Ancient Greek theatre was used for performances of tragedy, comedy, and other forms of dramatic presentations. It was the most popular form of entertainment in the ancient world, and its influence is still seen today. The largest audience in Greek theatre was typically reserved for performances held at either the Theatre of Dionysus or at the Herodes Atticus Theater.
The Theatre of Dionysus was located on the south slope of the Acropolis in Athens and it is considered to be one of the first theatres ever built in ancient Greece.
It is estimated that it could accommodate up to 17,000 spectators, making it one of the largest theatres in antiquity. The theatre was used for performances by tragedians such as Aeschylus, Sophocles, Euripides, and Aristophanes.
The Herodes Atticus Theatre was also located in Athens on the slopes of the Acropolis and was built around 160 AD by a wealthy Roman senator named Herodes Atticus. The theatre could accommodate up to 5,000 people and it became a popular venue for theatrical productions as well as concerts and religious ceremonies.
Conclusion:
The largest audience in Greek theatre would typically have been found at either the Theatre of Dionysus or at the Herodes Atticus Theater which both had capacity for over 5,000 people each. The Theatre of Dionysus could accommodate up to 17,000 spectators making it one of the largest theatres in antiquity. Both venues were popular for theatrical productions as well as concerts and religious ceremonies.