It is asked to which extent the impact of religion and religious beliefs can be influential in architectural works. Historically, it seems that a study on the transformation in religious beliefs can be of great importance to track this impact. Advent of Islam into Iran and change of religion in Iran can be known as one of the most influential transformations in people's beliefs, followed by abundant consequences at social, cultural and art areas. Architecture, as one of manifestations of

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... and civilization, indicates many transformations, beliefs and willingness of a community. Thus, hesitation in social events and attention to change of religion at the early Islamic centuries besides study on architectural and decorative features at this period and their comparison with the period of past can help to give response to the raised question. In this study, the relationship between social and religious developments analyzed. The developments at architectural and decorative areas are also examined.