Agnus Dei (liturgy) Agnus Dei (liturgy) In the Mass of the Roman Rite and also in the Eucharist of the Anglican Communion, the Lutheran Church, and the Western Rite of the Orthodox Church the Agnus Dei is the invocation to the Lamb of God sung or recited during the fraction of the Host. The Syrian custom of a chant addressed to the Lamb of God was introduced into the Roman Rite Mass by Pope Sergius I (687–701) in the context of his rejection of the Council of Trullo (692), which was well received in the Byzantine East and called the Quinisext Council, but
Agnus Dei (Barber) the Renaissance by Palestrina and Gabrieli. Violinist Phillip Ying says about the quartet movement: "The score looks so clear, like a counterpoint exercise, and the power of it is in the economy of means." "Agnus Dei" is in B-flat minor, marked "molto adagio" (very slow) and "molto espressivo" (very expressive) and in the beginning "pp" (pianissimo, very soft). The initial time is 4/2, but some measures are expanded to 5/2 and 6/2 throughout the piece of 69 measures. The music is set for soprano, alto, tenor and bass (SATB); all four parts are sometimes divided; measures 12 to 14 call