The Hill O Many Stanes is an area with about 200 upright stones, none more than a metre high. The rows are not parallel, however, and they create a fan-shaped pattern. This arrangement is believed to be a relic of Bronze Age times.
In Megalithic Lunar Observatories (Oxford University Press, 1971) Alexander Thom presented evidence that the stone rows were in effect a Bronze Age lunar observatory, tracking lunar movements over a cycle of 18.6 years. However, more than twenty similar stone rows are now known in Caithness and Sutherland and none of the others has been linked with astronomical observations.
In Britain stone rows of this kind are unknown outside Caithness and Sutherland, but similar rows of much taller stones are found in Brittany, France.
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.