I'm gonna halfta go with anchient Greece Bob for 469 silver talents (one talent was the cost of an entire tireme, the annual gross income of the city of Athens at the time of Perikles was 1000 talents, with another 6000 in reserve at its treasury.)
IMHO the Parthenon is one of the most beautiful buildings ever designed or built with human perception in mind. All temples in Greece were designed to be seen only from the outside. The viewers never entered a temple and could only glimpse the interior statues through the open doors. Basically a Doric Temple in which many Ionic elements were incorporated. While the integration of Doric and Ionic elements on the same temple was not a new development in Greek architecture, it was rare.
There are no absolute straight lines on the Parthenon. The columns of the peristyle taper on a slight arc as they reach the top of the building giving the impression that they are burdened by the weight of the roof.
The peristyle columns are over ten meters tall, and incline slightly towards the center of the building at the top (about 7 cm), while the platform upon which they rest bows on a gentle arc which brings the corners about 12 cm closer to the ground than the middle.
The columns that appear at the corners of the temple are 1/40th (about 6 cm) larger in diameter than all the other columns, while they the space around them is smaller than the rest of the columns by about 25 cm. The reason for this slight adaptation of the corner columns is due to the fact that they are set against the bright sky, which would make them appear a little thinner and a little further apart than the columns set against the darker background of the building wall. The increase in size and decrease of space thus compensates for the illusion that the bright background would normally cause.
•Year Built: 447-432 BC
•Precise Dimensions:
◦Width East: 30.875 m
◦Width West: 30.8835 m
◦Length North: 69.5151 m
◦Length South: 69.5115 m
•Width to length Ratio: 9:4
◦Width to height Ratio (without the Pediments): 9:4
•Number of stones used to built the Parthenon: Approximated at 13400 stones.
•Architects: Iktinos and Kallikrates
•Parthenon Cost: 469 talents