Lamb of God modern Roman Catholic Christology, Karl Rahner has continued to elaborate on the analogy that the blood of the Lamb of God, and the water flowing from the side of Christ on Calvary, had a cleansing nature, similar to baptismal water. In this analogy, the blood of the Lamb washed away the sins of humanity in a new baptism, redeeming it from the fall of Adam. 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
Holy Family with Christ as Imperator mundi the Baptist" (Dresden). It may be the earliest in the series and takes a more traditional approach, with the infant Christ and John the Baptist standing on a simple parapet and a black background, rather than the curved parapet and more nuanced background in the London example. John holds a scroll bearing Ecce Agnus Dei and points to Christ, who is shown as 'imperator mundi' or 'emperor of the world', holding a cross and an orb. There are gold highlights on the Virgin's veil, whilst behind her is a female saint, most probably her mother saint Anne or perhaps John's