A detailed architectural and chronological study of the royal fortress on the Thames, tracing its development from Norman origins through medieval and Tudor eras. The narrative combines careful descriptions of buildings, plans, and material features with accounts of the site’s administrative, military, and penal uses, including imprisonment and executions. The author stresses reliance on documentary evidence for early history and augments the text with numerous illustrations, plates, and plans. Chapters proceed chronologically through successive reigns, offering a measured synthesis of structural evolution, institutional functions, and notable episodes connected with the complex.