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.
Bruno Bartoletti Bruno Bartoletti (Sesto Fiorentino, 10 June 1926 – Florence, 9 June 2013) was an Italian operatic conductor. His active international career lasted from 1953 to 2007, and he specialized in the Italian repertory and contemporary works. He was particularly noted for his 51-year association with Lyric Opera of Chicago, as co-artistic director, artistic director, principal conductor, and artistic director emeritus. He also served as Artistic Director of both the Teatro dell'Opera di Roma (1965–1973) and the Maggio Musicale Fiorentino (1985–1991), and as principal conductor of the Danish Royal Opera (1957–1960), in addition to frequent work as a guest conductor at various major opera houses.