Concerto Grosso is a work for string orchestra by Ralph Vaughan Williams. Originally composed in 1950 for a performance by the Rural Schools Music Association conducted by Sir Adrian Boult, the piece is unique in that the orchestra is split into three sections based on skill: Concertino (Advanced), Tutti (Intermediate), and Ad Lib (Novice) which only plays open strings.
The piece is in five movements:
A typical performance lasts about 14 minutes.