Modern term for the problem arising in Greek stone constructions of the Doric order in the attempt to effect a regular sequence, around a corner of, triglyph and metope in the frieze above a row of columns. In canonical Doric structure, every other triglyph rests over the centre of a column. At angles this becomes unfeasible where the depth of the architrave ( Epistylion) exceeds the breadth of a triglyph, since in that case either the architrave is no longer centred on the abacus of the angle capital, or the centre of the angle triglyph …