Located on the southern fringe of the Hauts-de-France region, Senlis is a unique town with an exceptional built heritage that has suffered little destruction due to the two world wars. The architectural heritage, public and private, visible from the historic streets of the city center dates mostly from the eighteenth and nineteenth centuries. However it masks, on the surface and in the ground, a first-rate archaeological heritage whose oldest elements date back to the 1st century. Observers and scholars have long understood that this was evidence of a rich past, but their first attempts at understanding this history were hampered by the absence of links between architectural and buried heritage, between historians and archaeologists. There are many old publications, including those of G. Matherat and M. Durand who recorded all the discoveries made between 1943 and 2001, nearly 60 years of activity. All the scientific information accumulated since 2002, since the retirement of Mr. Durand, is scattered and not widely available, often privately published. The number of contributors (17), archaeological operators (3) and the very nature of the operations (46 preventive archaeology operations ranging from 15 m² to 2.5 ha) are all factors that prevent the necessary overview. The purpose of this publication is not to reinterpret previous results: they are considered as accepted and discussing them would require a complex and time-consuming return to the sources. More modestly, the objective is to propose a summary work, by gathering the research of the last two decades. First by revealing the main contributions of each of the forty-six operations, whatever their status, then by proposing some avenues of reflection and research that can guide the future contributors who come to Senlis, both in the heart of the city and on its fringes and on its rural outskirts. Traduction : John Lynch.