The word "proscenium" refers to the front part of a stage in a theater. It is the area where actors perform, separated from the audience by a frame or arch. Full definition
Beautiful on the outside, it had been subdivided into a warren of temporary offices and it charmingly retained all of the original features from its construction in 1925 — including pint - sized toilets and a multipurpose auditorium with proscenium stage and two basketball hoops. (dnalc.org)
In Crush, 2016, from the Rome (Eternal Cities) series, a fragmented pink proscenium arch hangs over a jumbled night scene of Rome. (garveysimon.com)
On the one hand you have this photographic element, which implies a space that you can cast yourself into — the idea of painting as a kind of proscenium. (milesmcenery.com)