Opera house as they sing. This occurs in the Met's productions of operas such as "Aida" and "Tales of Hoffman". London's Royal Opera House, which was remodeled in the late 1990s, retained the original 1858 auditorium at its core, but added completely new backstage and wing spaces as well as an additional performance space and public areas. Much the same happened in the remodeling of Milan's La Scala opera house between 2002 and 2004. Although stage, lighting and other production aspects of opera houses often make use of the latest technology, traditional opera houses have not used sound reinforcement systems with microphones
Cairo Opera Ballet Company in 1971, followed by President Anwar Sadat severing Egypt's ties with Russia in 1972, led to a serious decline of the company. The company and its ballet school had a resurgence following the construction of the new Cairo Opera House in 1988. Since 2004, Erminia Gambarelli Kamel has been the company's artistic director. Trained at the La Scala Theatre Ballet School, Kamel joined the Cairo Opera Ballet Company as a principal dancer in 1982. One of the soloists is Mahmoud Atef El Henidy, since 2004–2013. Cairo Opera Ballet Company The Cairo Opera Ballet Company is the resident ballet company of