Andrew Lloyd Webber's The Phantom of the Opera is a lavish, long-running musical about a mysterious, masked composer who haunts the Paris Opera House and the young soprano he obsesses over. This touring production plays at the San Diego Civic Theatre in downtown San Diego, a major performing-arts venue that hosts opera, concerts and musicals. The show is notable for its sweeping score (including “The Music of the Night”), elaborate sets and costumes, and its status as one of the world's longest-running theatrical works.