This article looks at Topkapı Palace as a showcase reflecting the changing cultural heritage policies of the Allies, as well as of the İstanbul and Ankara governments, during the occupation of İstanbul from 1918 to 1923. It analyzes the military, archaeological, and cultural facets of the occupation, focusing first on the military takeover of the Topkapı gardens, then on the French archaeological mission at the Seraglio, and finally on conflicts over the possession of the imperial treasures and sacred relics. Drawing on primary sources from Ottoman, Turkish, French, and British archives, memoirs, letters, newspapers, and visual material, this article explores the versatility of cultural heritage policies during the occupation and the entangled relations among various power groups, institutions, and actors. The military, strategic, cultural, and historical significance of the royal complex, together with its invaluable imperial collections, made the historic palace a place of rivalry and contestation, as well as deception and cooperation, among various agents and actors, including the Ottoman military and bureaucratic officials, local and foreign archaeologists, the dynastic family, the Interallied government, the occupation forces, and the Turkish resistance forces, ultimately reflecting the military and political empowerment of Ankara.