Chûn Quoit is one of the best preserved of all Neolithic quoits (also called dolmens or cromlechs) in western Cornwall. Like the other quoits, it was probably covered by a round barrow, of which much evidence abounds. It was a closed chamber and its mushroom-domed capstone measures 3.3 m by 3m. There is a cup mark on top of the capstone. It is supported about 2 m from the ground by four substantial slabs. There is evidence of an entrance passage to the south-east within the mound area. The site was examined in 1871 but no significant finds were made.
In the vicinity of Chûn Quoit there are many other megalithic and archaeological sites, such as Lanyon Quoit, Mulfra Quoit, Mên-an-Tol and Mên Scryfa. The rocky outline of Carn Kenidjack marks the position of midwinter sunset away to the south-west.
This is the only dolmen in West Penwith to retain its capstone 'in situ' – others have been re-settled. It is believed to have been built around 2400 BC, two millennia before the neighbouring Chûn Castle.
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.