The Hilliard Ensemble was a British male vocal quartet, founded in 1974. Although most of their work focused on Medieval and Renaissance
periods, the Hilliard Ensemble also performed contemporary music, working frequently with the Estonian composer Arvo Pärt and included in its
concerts works by John Cage, Gavin Bryars, Giya Kancheli, and Heinz Holliger. - Wiki.
The group disbanded in 2014.
