Measurements of the Abacus and Soffit of Architrave over each Column. Showing also the cracks and other displacements now cristing in the lower bed of the Architrave. Plate 6, 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

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Acropolis Architecture Athens Classical Parthenon Reconstructions and Plans Temple