What is the reasoning for the Grand Paris? What does the transformation of the relationship between Paris and its suburbs imply? “Searching for the Grand Paris” is an original MOOC featuring accounts from residents, association representatives, experts, and researchers. It also contains archival footage and documents, as well as a comparative analysis of Brussels, London, and other French cities. The MOOC combines historical and comparative approaches with a discussion of controversial topics. It also reflects upon the notion of scale and questions what is at stake in the implementation of the Grand Paris. It discusses the evolution of Paris and its region, as well as issues such as ethnic and social segregation, economic growth, safety, the environment, housing, transportation, city construction, education, and culture. “Searching for the Grand Paris” is not exclusively directed towards universities. It is free and for the general public. This dynamic, even lively, MOOC was made in collaboration with students from the University of Science Po (Paris Institute of Political Studies), along with many other contributors.