In 2015 Ramon Tebar was named  Principal Guest Conductor of an opera house located in what city?
Ramón Tebar:  In March 2015, he was named Principal Guest Conductor of Spain's Palau de les Arts Reina Sofia. 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.
Valencia