Parthenon: Plan of Celling of Posticum and fragments of Coffers lying on the ground. Plate 15,Chapter II, Sect. 2. By Francis Penrose, 1888.
An investigation of the principles of Athenian architecture: or the results of a recent survey conducted chiefly with reference to the optical refinements exhibited in the construction of the ancient buildings at Athens.
Francis Penrose, 1888
Source: https://digi.ub.uni-heidelberg.de/diglit/penrose1888
Images in the public domain