Dossal

A Dossal (or dossel, dorsel, dosel), from French dos (back), is an ecclesiastical ornamented cloth suspended behind an altar.^[1] Altar screen is sometimes used as a synonym for the Dossal.^[2]

References

1. ↑  Chisholm, Hugh, ed. (1911). "Dossal". Encyclopædia Britannica (11th ed.). Cambridge University Press. 
2. ↑  "Altar Screen". Catholic Encyclopedia. New York: Robert Appleton Company. 1913.