4th Wall Theatre, Inc. (aka 4th Wall Musical Theatre) is a non-equity theatre company in residence at the Westminster Arts Center on the campus of Bloomfield College, in Bloomfield, New Jersey, approximately 10 miles from Manhattan. The group derived its name from the theatre term the fourth wall coined by Denis Diderot which describes it as “the imaginary wall at the front of the stage in a proscenium, through which the audience sees the action in the world of the play”.