Determining where each piece goes
Although the Parthenon
might appear to be geometrically straight and built from
interchangeable parts, it is not. The ancient Greeks worked subtle
curves into the columns, architraves, floors, and other
architectural elements, possibly to make the building appear more
"alive" or to counteract optical illusions of sagging that parallel
lines (like roof and floor lines) can cause. As a result, each of
the Parthenon's 70,000 pieces is unique and fits in only one place.