The Royal Theater of Madrid is the city's main opera house, and is located in the vicinity of the Grand Plaza Isabel II, just in front of the Royal Palace. It opened in 1850, underwent a massive renovation in the 1990s, and reopened in 1997 to host local and international opera productions. It also holds concerts hosting big names such as Rodtewar Set, Sting, and Rufus Wainwright, all of whom sang at the Theater Royal, as well as ballet and theatrical performances. Visitors can also take behind-the-scenes tours, learning more about the building's fascinating history.