Through the evidence of the court records (sijill s), this dissertation examines the interplay between Islamic jurisprudence (fiqh), codified sultanic law (qanun ) and customary law in the shari`a courts of Ottoman-Cairo in the sixteenth and seventeenth centuries. The thesis forwarded suggests that custom was a declining source of law in these centuries as a result of two factors: the imposition of a codified qanun, and a redacted fiqh.Conflict between Egyptian and Ottoman jurists, a well-documented feature of the sixteenth century, is often depicted as a by-product of the tension between qanun and fiqh. Questioning this framework of analysis, this study views the conflict between Egyptian jurists and their Ottoman counterparts as an exempl...