This paper aims to study the local influences that characterized the characteristics of religious architecture in Aleppo before the Ottoman era and positively affected it during the Ottoman period. The paper aims also to study the foreign influences on these buildings, whether those that appeared in conjunction with the foreign Ottoman style or those that came from other countries of the Islamic world, settled in the city of Aleppo, and continued during the Ottoman period. The paper studies these influences on the religious architecture in Aleppo during the Ottoman period through following its plans and its architectural elements to show the effect of the local and foreign influences on it and show the plans and the architectural elements that gathered between the two influences. Moreover, the paper sheds light on local influences in the field of the architectural treatments used by the architect during the Ottoman period.