for SATB unaccompanied
'Traditionally sung on Christmas Eve, 'O Virgo virginum' is often described as the eighth 'O' Antiphon and praises Mary, 'O virgin of (amongst) virgins.' McDowall's setting is vigorous and joyful, with intimations of medieval plainchant. O Virgo virginum is the final movement of McDowall's set of three 'O' text settings conceived as Trinity Triptych.