The Harmoniemesse, Haydn's last major sacred work, combines liturgical solemnity with dazzling orchestral writing empowered by his masterly use of the winds. In contrast, the intimate, luminous Missa brevis 'St John of God', reveals a more contemplative faith. Directing Les Arts Florissants, William Christie illuminates these two sides of the composer with authority and poetic sensitivity, well served by a top-flight quartet of soloists.