National Symphony Orchestra
The National Symphony Orchestra (NSO), founded in 1931, is an American symphony orchestra based in Washington, D.C.. Its principal performing venue is the John F. Kennedy Center for the Performing Arts.
Chamartín Symphony Orchestra
The Orchestra, named after the Chamartín administrative district of Madrid, was founded as an ensemble of semi-professional players in 1993 and gave its first concert at a local concert hall. Until 2000 the orchestra worked as two separated ensembles, a chamber and a symphony orchestra, becoming a professional orchestra and starting annual seasons of concerts at the National Auditorium of Music. In addition to its concert season in Madrid, the orchestra has toured Europe, performing in Czech Republic, France, Belgium, Austria and Slovakia.