The Heraion was a sanctuary dedicated to the goddess Hera, situated 8 kilometers from Argos. Built on the southern foothills of the Euboian mountain range, it included ritual sites like the Eleutherian Water for purification and the river Glykeia. Excavations revealed its connection to Mycenaean times and its importance grew from the 8th century BC, becoming a key religious and political center for Argos.
The sanctuary featured a monumental stairway leading to terraces with structures like a Doric stoa and a new temple designed by architect Eupolemos in 420 BC, housing renowned sculptures. Additional structures included an altar and a hypostyle hall, reflecting its significance in Hellenistic and Roman eras. The site remained revered by the Argives until late antiquity, reflecting its enduring importance in Greek religious life.
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.