The only complete theatre design of architect Lewin Sharp, the Apollo was specifically designed for musical theatre and named after the Greek god of the arts and leader of the muses. It was constructed by builder Walter Wallis of plain London brick in keeping with the neighbouring streets; the front piece is in the Renaissance style with a sculpted stone fascia by T. Simpson. The structure encloses a four-level auditorium, with three cantilevered balconies and a first-floor central loggia, decorated in the Louis XIV Style by Hubert van Hooydonk. In keeping with then European style, each level has its own foyer and promenade.