The Phantom of the Opera is a 1986 musical with music by Andrew Lloyd Webber, lyrics by Charles Hart, and a libretto by Lloyd Webber and Richard Stilgoe. Based on the 1910 French novel of the same name by Gaston Leroux, its central plot revolves around a beautiful soprano, Christine Daaé, who becomes the obsession of a mysterious, disfigured musical genius living in the subterranean labyrinth beneath the Paris Opéra House. The musical opened in London's West End in 1986, and on Broadway in 1988. 

In 1984, Lloyd Webber contacted Cameron Mackintosh, the co-producer of Cats and Song and Dance, to propose a new musical. He was aiming for a romantic piece, and suggested Gaston Leroux's book The Phantom of the Opera as a basis. They screened both the 1925 Lon Chaney and the 1943 Claude Rains motion picture versions, but neither saw any effective way to make the leap from film to stage. Later, in New York, Lloyd Webber found a second-hand copy of the original, long-out-of-print Leroux novel, which supplied the necessary inspiration to develop a musical: "I was actually writing something else at the time, and I realised that the reason I was hung up was because I was trying to write a major romantic story, and I had been trying to do that ever since I started my career. Then with the Phantom, it was there!"

Lyricists

Lloyd Webber first approached Jim Steinman to write the lyrics because of his "dark obsessive side", but he declined in order to fulfill his commitments on a Bonnie Tyler album. Alan Jay Lerner was then recruited, but he became seriously ill after joining the project and was forced to withdraw; none of his contributions (mostly involving the song "Masquerade") are credited in the show. Richard Stilgoe, the lyricist for Starlight Express, wrote most of the original lyrics for the production. Charles Hart, a young and then-relatively unknown lyricist, later rewrote many of the lyrics, along with original lyrics for "Think of Me". Some of Stilgoe's original contributions are still present in the final version, however. Phantom is primarily a sung-through musical, however there are scattered lines of spoken dialogue.

Score

Inspired in part by an earlier musical version of the same story by Ken Hill, Lloyd Webber's score is sometimes operatic in style but maintains the form and structure of a musical throughout. The full-fledged operatic passages are reserved principally for subsidiary characters such as Andre and Firmin, Carlotta, and Piangi. They are also used to provide the content of the fictional operas that are taking place within the show itself, viz., Hannibal, Il Muto, and the Phantom's masterwork, Don Juan Triumphant. "Here, Lloyd Webber pastiched various styles from the grand operas of Meyerbeer through to Mozart and even Gilbert and Sullivan." These pieces are often presented as musical fragments, interrupted by dialogue or action sequences in order to clearly define the musical's "show within a show" format.

The musical extracts from the Phantom's opera, "Don Juan Triumphant", heard during the latter stages of the show, are dissonant and modern—"suggesting, perhaps, that the Phantom is ahead of his time artistically".

Design, direction, and choreography

Maria Björnson designed the sets and over 200 costumes, including the elaborate gowns in the "Masquerade" sequence. Her set designs, including the chandelier, subterranean gondola, and sweeping staircase, earned her multiple awards. Hal Prince, director of Cabaret, Candide, Follies, and Lloyd Webber's Evita, directed the production, while Gillian Lynne, associate director and choreographer of Cats, provided the integral musical staging and choreography.