Numbers have long been seen as expressions of cosmic order, possibly deriving from ancient Babylonian observation of regular cosmic events, such as night and day, the phases of the moon and cycles of the year. Belief architecture Filled with symbolism for the reason of its indirect impact on the spiritual atmosphere of this type of buildings. Symbolism can be found in which symbolic colors, symbolic shapes, number symbolism and other symbolic tools that emphasize on the spatial experience of these buildings. The research deals with number symbolism in religious buildings in Egypt and their meaning. This study extends along three periods of Egyptian architecture; that represent Ancient Egyptian Architecture, Coptic Architecture and Islamic Architecture in Egypt.