Painted and/or carved back wall of an altarThe altar is the central piece of furniture used in the Eucharist. Originally, an altar used to be a sacrificial table. This fits in with the theological view that Jesus sacrificed himself, through his death on the cross, to redeem mankind, as symbolically depicted in the painting "The Adoration of the Lamb" by the Van Eyck brothers. In modern times the altar is often described as "the table of the Lord". Here the altar refers to the table at which Jesus and his disciples were seated at the institution of the Eucharist during the Last Supper. Just as Jesus and his disciples did then, the priest and the faithful gather around this table with bread and wine. placed against a wall or pillar. Below the retable there is sometimes a predellaThe base of an altarpiece. Like the altarpiece, the predella may be painted or sculpted..