Sanctuary of Heracles was a large paved court surrounded by buildings on three sides and with the principal altar in the centre. It wouldn’t have been as separate from the rest of the town as many sanctuaries, and would have been part of the town’s landscape, immediately apparent to the citizens. The 5th century re-buildings were on a much larger scale than the original 6th century rooms.
As you stand at the gate of Silenus, at the entrance to the sanctuary, the temple of Heracles is at the opposite end, at the very North -it would have been on a raised platform. Originally, it was just a single chambered naos, but was later embellished with a wide colonnade on all sides, giving it a square form, slightly different from the traditional rectangular temples, but the colonnade on all sides is very traditionally Greek.
To the west and at the front of this temple was the stepped and porched entrance to the temenos – this was the last addition to the sanctuary, in the 2nd century BC. It opened onto a paved court with the stepped altar in its centre, and a long gallery hall forming the opposite border (along to the right from the entrance at the gate of Silenus).
The South side was occupied by a porticoed building containing official administrative offices for the sanctuary and the banqueting rooms – where the important early summer feast the Heracleia was celebrated.
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.