The Theatre of Dionysus, the primary venue for performances of ancient Attic drama, dominates the southern slope of the Acropolis. The theatre is located to the north of the sanctuary of Dionysus Eleuthereus, with which it is functionally and symbolically connected, as the festival of the Great Dionysia, the greatest celebration in honour of Dionysus, culminated there. During the final days of the festival, tragic poets presented their works, followed by the awarding of the winners. The majority of the architectural remains visible today date back to the 4th century BCE.
Near the first, archaic temple of Dionysus Eleuthereus, circular construction resembling a theatre orchestra was formed after the middle of the 6th century BCE. It is believed that this space hosted events with performative and religious characteristics, attended by spectators either standing around the orchestra or seated on the slope. Later, in the 5th century BCE, wooden planks had been placed in front of the orchestra, possibly in a Π-shaped arrangement, on which stepped seats had been placed for the spectators to sit. This wooden structure for the spectators seems to have become a permanent feature by the mid-5th century BCE, while the stage was likely indicated by makeshift, movable constructions.
The Dionysian theatre was remodelled in the 4th c. BCE in the context of the economic recovery of Athens after the Peloponnesian War, under archon Lycurgus. At that time, a stone circular orchestra, a marble stage with wings and a semi-circular koilon, the area designated for the spectators, were constructed. The koilon, made of limestone, was divided by vertical stairs into tiers and by two horizontal walkways into three parts. It is estimated that it could hold 17.000-19.000 spectators. For the first row of seats, the prohedria, marble thrones were made for city officials, foreign dignitaries and priests.
During the Hellenistic and Roman periods, the theatre underwent modifications and reconstructions: the scaenae frons (the stage’s architectural background) acquired a two-story facade, the orchestra was paved with marble slabs, the backstages were relocated so as to place sculptures in the side entrances, a raised podium was built in the central tier and new rows of seats were added to the prohedria. Following the invasion of the Heruli that caused significant damages, a part of the theatre was incorporated into the late Roman city wall, while extensive looting of architectural elements took place. It appears that its function as a theatre ceased, while it continued to serve as a meeting place for the Ekklesia (Assembly of the Demos). The last modification concerned the modification of the logeion (the part of the stage used by actors) by archon Phaedros (2nd half of the 4th–beginning of the 5th century) for the assembly needs of the Demos. In the 5th century, a church was established at the eastern entrance of the stage (parodos), the so-called basilica of the Dionysian theatre.