Corinthian Archivolt
The archivolt, commencing at the outer rim, consists of a fillet and reversa and three unequal facias.
If the total width is divided into two, the point of bisection will be the centre of a small reversa moulding between the two outer facias. The outer reversa and the inner facia are each about one-sixth of the total width and the small reversa is about two-thirds of the inner facia.