e major groups. The first type of ornamentation emphasizes the present shapes and forms of the architectural unit. The themes used were vegetal bands for vertical or horizontal elements, marble imitations for the lower parts of long walls, chevrons or other types of borders on floors and domes, and even whole trees on the spandrels or undersides of arches. All these motifs tend to be quite traditional, being taken from the rich decorative vocabularies of pre-Islamic Iran.
             The second group consists of decorative motifs for which a concrete religious meaning can be given. For example, in The Dome of The Rock as well as the Great Mosque of Cordoba, there were religi
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