Ensemble performing with period instruments founded by John Eliot Gardiner in 1978 and often appearing in company with the Monteverdi Choir. Has made many highly‐praised recordings, incl. Bach's B minor Mass and St Matthew Passion, Beethoven's Missa solemnis, Mozart pf. concs., syms., and Requiem, Monteverdi Vespers, and Purcell semi‐operas. Salzburg Fest. début 1990 (Monteverdi's Orfeo).