archaic solution vs classical solution
……..The origin of this “conflict” lies in the fact that there was commonly one triglyph over each column and one in between. In the corners, however, the outermost triglyph was always situated in the corner, and because the thickness of the architrave was greater than the breath of the triglyph, the corner triglyph didn’t fall in the middle of the corner column but outside of it. As a result of this, one had either to make the corner metopes broader, (see A, the archaic solution) or shorten the corner intercolumniation (see B, the classical solution)…………Vitruvius, on the other hand, suggested that there should be a half metope left at the corner outside the outermost triglyph (C), this Vitruvian corner was, however, never used by the archaic and classical Greeks………….if we compare the effects of B and C, the half metope in the corner opens up the corner; it implicates continuity, infinity, and this was a contradiction in terms for the ancient Greeks. A good totality had to be a unity although composed of many, a unity in plurality, not only a row of mute columns. The triglyph in the corner, which was painted dark, on the other hand, closes the corner effectively, thus gathering the row of columns into a sculptural body……..in the Parthenon shorter metopes were used in the corners………