In 2015 Ramon Tebar was named  Principal Guest Conductor of an opera house located in what city?
Palau de les Arts Reina Sofia Palau de les Arts Reina Sofia (] ; Spanish: "Palacio de las Artes Reina Sofía" ; anglicised as "Reina (Queen) Sofía Palace of the Arts") is an opera house and cultural centre in Valencia, Spain. It opened on 8 October 2005; its first opera staging was of Beethoven's "Fidelio" on 25 October 2006. Tenor and conductor Plácido Domingo has maintained a special relationship with the Palau since its founding and has established a young singers training program there.
Opera house An opera house is a theatre building used for opera performances that consists of a stage, an orchestra pit, audience seating, and backstage facilities for costumes and set building. While some venues are constructed specifically for operas, other opera houses are part of larger performing arts centers.