, or -ον
) is the name given to one of the alternating
members of the frieze of the Doric order, the other being called METOPAE.
The triglyph is divided by two vertical cuts (canaliculi
) into three bars (μηροί,
); hence its name. It also has a
semi-canaliculus at each side. The canaliculi have in early specimens a
curved or ogier termination; later they are included by straight lines.
Properly there should be one triglyph over each column, and one over each
intercolumnium in the Doric order; at the corners this arrangement is
slightly modified, so that the triglyph may adjoin the corner of the
building. The triglyph seems always to have been painted blue. Triglyphs are
supposed to have originated from an imitation of the visible ends of
projecting beams in a wooden structure (Vitr.