Augustae was built as a fortified military camp in the mid-1st century, as the first fortification was made of wood and earth. The castle was naturally protected to the south by the Ogosta River, to the east and north by marshland. Access was possible only from the western side, where a fortified wall reinforced with a ditch was erected. In the 2nd-4th century Augustae developed as a Roman and an early Byzantine urban centre. Its total area reaches about 9 hа.
The fortress had the shape of an irregular pentagon extending from north to south. The fortress wall was dug inside up to 2.30 m and its thickness reached 2.50 m. Its walls were made of roughly worked stones, bonded with white mortar. The fortress had three gates - one to the west, north and east. The defence system consisted of protruding towers. The necropolis was located west of the fortress. Archaeologists have uncovered the fortification system of the Early Roman camp and the settlement dating to the Late Antiquity. The western wall with three rectangular towers and the western gate of the stone fortification have been explored. The site of the severely destroyed northern gate has also been established. Buildings have been uncovered in the inner part of the site, located in the approximate centre of the early Roman camp. In the 3rd–4th century the city was restored periodically after the invasions of the Goths. The last destructive invasion by the Avars in the 6th century marked the end of its existence.
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.