This architectural history of the Citadel of Cairo uses indices from maps, photographs, plans of hitherto unstudied structures, and a large array of historical documents to chronologically reconstruct the Citadel's development from its foundation by Salah al-Din until it reached its most monumental form in the middle of the fourteenth century. The study analyzes the influence of Mamluk socio-political hierarchy on the conceptualization of the Citadel's spaces and forms; assesses its impact on medieval Cairo; proposes a new interpretation for the development of Mamluk royal architecture; and presents new definitions for a number of medieval architectural terms. By weaving the history of the Citadel together with the history of Cairo and the Mamluk system, this book is relevant to historians of architecture and urbanism and medieval historians.