PROSCENIUM (Gr. 7rpoutci/veov)  , that part of the stage in the ancient Greek theatre which lies in front of the o-,cnvij, scena, the back wall; the word appears to embrace the whole stage between the bpxi7vrpa and the trrcr7vi7 . In the modern theatre the word is applied to that part of the stage which is in front of the curtain and the orchestra, and sometimes to the whole front of the stage, including the curtain and the arch containing it, which separates the stage from the auditorium .