Playwrights Horizons is an off-Broadway institution with a mission to develop new works from both veteran and aspiring American contemporary playwrights, composers and lyricists. The not-for-profit company was founded in 1971 by Robert Moss and was originally based at the Clark Center Y, before moving to its current home on 42nd Street. The Playwrights Horizons building was constructed on the site of a former burlesque venue and holds two stages for off-Broadway productions. The Mainstage Theater has a 198-seat capacity, whilst the slightly smaller Peter Jay Sharp Theater offers 128 seats in total. Playwrights Horizons also offers a range of developmental programmes including script readings and musical theater workshops. It also houses the Playwrights Horizons Theater School – an affiliate of NYU’s Tisch School of the Arts.