JS Bach's orchestral suites are collections of five to seven shorter dance-like compositions. The second movement of the D Major suite, the Air, gained in popularity when 19th century German violinist August Wilhelmj arranged the piece for solo violin. His version is known as Air on a G String. The Cairo Conservatory of Music Orchestra performed Bach's Air from the D Major Suite under the direction of Ivan Filev as part of the 2007 Beethovenfest.