keystones

Normalcy and reality were keystones of the Republican agenda.

Modern sculptured keystones may be seen over the p. 16entrances, bearing the effigy of a double-headed swan.

It was one of those glances which are as keystones to situations.

As keystones were of different types in the various earlier decades of Gothic, they too help to substantiate an edifice.

The interlocking ribs had three lines of keystones, like the vault of Airvault (Deux-Svres).

Keystones were richly carved, and pretty figures and heads were added where the vault ribs met the framing arches.