This article studies how Allied archaeological activities in Ottoman lands between 1918 and 1923 were part of the post-war negotiations over those territories. It uses the occupation of İstanbul as a reference point to understand the larger reconstruction of the Middle East through the inspection of practices and policies used by the Allies in the realm of cultural heritage. It explores the changes that World War I brought to this realm and asks what kind of practices were used and why. Using archival documents and archaeological literature, it argues that the Allies used institutions like museums and schools of archaeology, scholarly activities such as excavations and publications, and laws and regulations on cultural property to make geopolitical claims in the region and legitimize their occupation while acquiring as many antiquities as possible. By comparing the motivations, practices, and results of Allied archaeological activities in the capital to those elsewhere in the Ottoman Empire, this study shines a light not only on the making of the post-war cultural heritage regime but also on the emerging geopolitical system in the Middle East.