The London Sinfonietta is a British chamber orchestra based in London that specializes in the performance of contemporary classical music. Nicholas Snowman and David Atherton co-founded the orchestra in 1968. Atherton was its first Music Director, from 1968-1973. Michael Vyner served as the Artistic Director from 1972-1989. Paul Crossley took over and served from 1988-1994. Markus Stenz served as Music Director from 1994-1998.