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.
Castile and León Symphony Orchestra The Castilla y León Symphony Orchestra ("Orquesta Sinfónica de Castilla y León", OSCyL for ahort) is a Spanish symphony orchestra from Valladolid created in 1991 following the disappearance of the Orquesta Ciudad de Valladolid. It is based in the Auditorio Miguel Delibes. British conductor Andrew Gourlay assumed the position as Chief Conductor in 2016. Jesús López Cobos is their Director Emeritus; Jaime Martin serves as principal guest conductor.