The longest-running Broadway show is "The Phantom of the Opera," which premiered in 1988. This musical, composed by Andrew Lloyd Webber, is based on the French novel by Gaston Leroux. Its captivating story revolves around a mysterious figure residing beneath the Paris Opera House and his love for a young soprano, Christine Daaé. The production combines elaborate sets, memorable music, and elaborate costumes, contributing to its enduring popularity over the decades. "The Phantom of the Opera" became a cultural phenomenon and left a significant mark on theatrical history.