The amphitheatre of Toulouse-Purpan is constructed on a filled structure, unlike those in Arles, Nîmes, and the Colosseum in Rome, where a hollow structure composed of vaults and pillars supports the tiers. The cavea (the rows of seats intended to receive the public) is fifteen meters wide. This area is separated from the arena by a wall and bound at the outside by a high wall covered in brick. The cavea is divided into equal segments compartmentalized by twenty-three arched horizontal corridors, the vomitoria.
The main entrance to the amphitheatre is located to the north of the arena and is 4.20 meters wide. The arch reproduces the height of the curved vault, which once covered the entry passage. The almond-like arena is sixty-two meters long by forty-six meters wide. Underneath this surface lies an underground network of drains, which leads to a vast ruined well in the center. This well catches the rainwater and allows for the rapid drainage of the arena, even today.
Abandoned at the end of the fourth century, the amphitheatre came to serve as a quarry. In this manner, the monument was completely stripped of its brick facing.
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.