Prooemium He parthenos semeron from Kontakion for Christmas Day (Byzantine) - Hymn Pange lingua with refrain Crux fidelis (Gallican) - Prece Deus miserere and antiphon Si ascendero (Mozarabic) - Psalmellus A summo caelo (Ambrosian) - Psalm Beatus vir with antiphon Erat autem aspectus (Gregorian) - Psalm In exitu Israel with antiphon Deus autem noster (Gregorian) Responsory Hodie nobis caelorum Rex (Gregorian) - Tract Qui confidunt in Domino (Gregorian) - Liturgical drama The Play of Herod.