The Tholos @ Delphi #Greece, Mt. #Parnassus

DSC_8262 n, originally uploaded by melusinaelena.

The Tholos at the base of Mount Parnassus:
3 of 20 Doric columns.

The Tholos (Ancient Rome) at the sanctuary of Athena Pronoia is a circular building that was constructed between 380 and 360 BC. It consisted of 20 Doric columns arranged with an exterior diameter of 14.76 meters, with 10 Corinthian columns in the interior.
The Tholos is located approximately a half a mile (800 m) from the main ruins at Delphi. Three of the Doric columns have been restored, making it the most popular site at Delphi for tourists to take photographs.
Vitruvius (vii, introduction) notes Theodorus of Samos as the architect of the Round Building which is at Delphi.