Extended angle intercolumniations in fifth-century Athenian Ionic
It is a widespread feature of Doric temples that the intercolumniations nearest the angles should be somewhat narrower than normal so as to allow a regular distribution of triglyphs and metopes in the frieze. The nature and working of this adjustment have been widely discussed; but little attention has been given to the contrary arrangement in two Athenian Ionic temples, where the intercolumniations nearest the angles are actually wider than normal. Of the standard handbooks on Greek architecture in English, only that of Dinsmoor notes that the angle intercolumniations of the north porch of the Erechtheion are 0·052 m larger than the central one, and even he does not discuss the fact in his main treatment of the building. He also notes that the angle intercolumniations of the temple by the Ilissos are 0·051 m greater than the central one, but attributes that to later distortion of the building. Shear mentions both these instances in her discussion of the possible works of Kallikrates, and accepts the wider intercolumniations of the Ilissos temple as part of the original design. Following Stevens, she explains this feature in the Erechtheion as intended to allow a regular spacing of the ceiling beams, and suggests that the same explanation may apply to the Ilissos temple too.