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
Crucifix of Ferdinand and Sancha cross. At the base of the cross, below the crucified figure, is a figure of Adam, and below that the inscription: FREDINANDUSREX<br>SANCIAREGINA indicating the commissioners of the work, King Ferdinand and Queen Sancha. The reverse of the cross bears plant figures, in the centre the Agnus Dei, and at the four extremities of the arms the symbols of the Four Evangelists. Crucifix of Ferdinand and Sancha The crucifix of Ferdinand and Sancha () is an ivory carving from "circa" 1063, today in the National Archaeological Museum of Spain. It was part of an offering by King Ferdinand I of León