La Sergenté is a Neolithic (4500 - 3250BC) passage grave leading into a circular chamber of diameter of 3.3m. The chamber walls are of dry stone construction and stand to a height of 75cm but originally would have risen to about 1.5m forming a vaulted roof. The fallen remains of this roof were found during excavtion in 1923. The chamber was paved with flat granite slabs except for a small partitioned off area on the west side.Parts of four, round bottomed, early Neolithic bowls, a few flint chips and fragments of charcoal were recovered during excavation. Though the style is unique to the Channel Islands this simple tomb is very similar to examples found in Brittany and Normandy.
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.