Doric Impost
The mouldings of the Doric Impost are as follows:
At the top there is a fillet and a bold ovolo, below which there is a bead-moulding or small torus with fillet and two facias. The lower facia, which is of slight projection is one-fourth of the total height. The upper facia and fillet are half the remainder.
No. 168. Detail of Archivolts and Imposts.