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
Fedora (opera) however, operatic tastes had changed, and the opera became performed more sporadically. The 1990s saw a resurgence of interest in "Fedora", with new productions at the Vienna Staatsoper, La Scala, New York's Metropolitan Opera, Chicago Lyric Opera, the Royal Opera House, Covent Garden, the Washington National Opera and the Teatro Colón in Buenos Aires. Notable singers in post-1990 productions include Mirella Freni, Renata Scotto, Agnes Baltsa, Katia Ricciarelli, and Maria Guleghina as Fedora; and Plácido Domingo, José Carreras, and José Cura as Loris. Among "Fedora's" most recent performances are those at the Vienna Staatsoper in 2003, La Scala in 2004,