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
Fountain of São João (Melgaço) by a wider base and triangular pediment. Above the base are two Tuscan pilasters, that extend into the body, crowned by slender cone-type pinnacles. The triangular/gabled pediment is traced by the lines of the frieze and cornices, also surmounted by a pinnacle. The lower part of the backrest includes a spout, that extends from an anthropomorphic figure, with undulating hair, while the figure is flanked by two serpents, with heads of dragons. Surmounting these figures is a concave niche sheltering an Agnus Dei, with the inscription "ECCE AGNUS DEI", surrounded by phytomorphic elements extending vertically. The niche is flanked by