The Callanish III stone circle is one of many megalithic structures around the better-known (and larger) Callanis Stones (I) on the west coast of the isle of Lewis. The stone circle consists of two concentric ellipses. The outer ring measures about 13.7 by 13.1 metres. It contains 13 stones, of which eight are still standing and five have fallen. The inner ring is a pronounced oval measuring 10.5 by 6.6 metres. Only four stones remain in the inner circle, the tallest of which measures 2.1 metres. There is no sign of a central mound or cairn.
It is just a few hundred metres from the Callanish II stone circle.
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.