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An altar cloth is used in the Christian liturgy to cover the altar. It serves as a sign of reverence as well as a decoration and a protection of the altar and the sacred vessels. In the orthodox churches it is covered by the antimension, which also contains the relics of saints.
Since the 2nd century the altar cloth has been seen as a symbol for the shroud of Jesus Christ; therefore it should be made of white linen. Another interpretation used two cloths and compared them with the body and soul of Christ.