Both of these structures are Ionic, as indicated by their volute capitals. Both also have simple entablatures with distinctive archtraves and friezes. The stepped cornice of the Harvard Medical School facade, however, is not a common classical design and is not like the flat and triangular cornices of the Erechtheion. Besides the cornices, the two structures are different in that the Harvard Medical School building has unfluted columns, a feature not see in Greek Ionic architecture. Those unfluted columns make this design distinctively imitating Roman architecture.