Columns and their capitals are one of the most prominent structural elements in Islamic architecture. A large part of the ancient columns were reused in Islamic architecture in Cairo, whether they were complete columns or their capitals, whether they were marble or granite, Roman, Byzantine or Egyptian in style. Granite columns, especially those crowned with Egyptian-style capitals, were used in some buildings of the Bahri Mamluk state (648-784 AH/1250-1382 AD) in various locations and in varying sizes in these structures. This research paper aims to shed light on the buildings in which movable granite columns were used, the locations of the granite columns in these structures, their sources, and the reasons for their use in the buildings of the Bahri Mamluk state.