It is known that the muqarnas decoration, which has been used in Islamic architecture for more than a thousand years, has various design and application methods in different periods and regions. When the portals with muqarnas found in Anatolia are considered, it is noteworthy that each muqarnas cover made with similar systems is different from the other. When the projection plans of the samples examined within the scope of the study were examined in detail, it was observed that the geometric scheme forming the plan was similar, but transformed into different designs during the transfer process to stone. The differences between these examples, which started with a geometric scheme similar to the design process, have been examined in terms of historical, formal application method and materials used.