The Tour Magne, or the Great Tower, is the only remnant of the ancient Augustan fortifications. Standing at the highest point of the Nïmes, Mont Cavalier, it overlooks the entire plain and is a focal point for all means of communication.
The tower was originally a dry-stone oval tower, with a maximum height of 18m and already part of a rampart. A structure that was both prestigious and strategic, it represented sanctuary and protected the oppidum. By doubling its height and incorporating it into the town walls, Augustus demonstrated the new power of the colony of Nîmes over the 'City' (in the territorial sense) of the Volcae. When the town’s population abandoned the higher ground, the Tour Magne nevertheless continued to play a military role. It was used to defend against the English during the Hundred Years’ War.
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.