Palau de les Arts Reina Sofía (Valencian: [paˈlaw ðe lez ˈaɾdz ˈrejna soˈfi.a]; Spanish: Palacio de las Artes Reina Sofía; anglicised as "Queen Sofía Palace of the Arts") is an opera house, performing arts centre, and urban landmark designed by Santiago Calatrava to anchor the northwest end of the City of Arts and Sciences 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.