Orchomenus was an ancient city of Arcadia, Greece. Originating as a prehistoric settlement, Orchomenus became one of the powerful cities in West Arcadia along with Tegea and Mantineia. The heyday of the city was between 7th–6th century BC and it became a rich city which minted its own currency.
Many monuments were revealed during the excavations and can be admired today including the theatre, the remains of the ancient agora, the city walls and the temple of Artemis Mesopolitis. Other monuments identified during the excavations are a Bouleuterion, a prehistoric tomb and a bridge of the Archaic Period.
The most important monument is the theatre (4th–3rd BC) with a capacity of 4,000. At an altitude of 800 metres it offered a spectacular view during cultural events.
Approaching the town from the south one can see tumuli on the left, chiefly composed of collections of stones as described by Pausanias. Below the acropolis is the tomb of Aristocrates and beyond are the fountains called Teneiae which Pausanias mentions (writing in the 2nd c. AD) as one of the most remarkable objects in the place. A little further are the Hellenistic ruins of Amilus.
On the southern plain is an ancient canal which conducts the waters from the surrounding mountains through the ravine into the lower northern plain.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.