3 Words to use with proscenium

It is as if we are looking at a series of proscenium arches, and are being invited as an audience to consider whether we are within a proscenium arch ourselves.

Shrieks of horror from the young ladies, who desist from knocking their croquet-balls into the orchestra and the proscenium boxes; and triumphant falling of a new act-drop.

If they, however, maintained their places in the tableau, they would have immediately after entered on to the apron, before the curtain, by way of the proscenium doors.

3 Words to use with  proscenium