From the desk of the Interim

“The Altar is the most sacred object, both in virtue of its consecration, and also because it represents Christ. Hence it is marked with fine incised crosses, symbolizing the five wounds, and is richly clothed with frontal and altar cloths. The Altar is so placed that it is exposed to public view at all times. At least two candlesticks with their candles should stand on every Altar, one at each extremity. The Sanctuary is that space, including the Altar steps and the pavement below them, which immediately surrounds the Altar. It is to be regarded as the most sacred part of the Church; and reverence demands that those having duties within it should wear the cassock, and at service time the surplice also. The Altar is always the central focus at all times, especially at worship.”
Taken from “Ritual Notes,” A Comprehensive Guide to the Rites and Ceremonies of the Book of Common Prayer of the English Church.
Edited by E.C.R. Lamburn. 
W.Knott and Son Limited 1964. Eleventh Edition.