Partnership/national study France-Germany: cross-border observation at the heart of Europe January 2019 Under the auspices of the French General Commission for Territorial Equality (CGET) and the German Federal Ministry of the Interior, Building and Community, the MOT and the BBSR (Federal Institute for Research on Building, Urban Affairs and Spatial Development) coordinated the publication of this brochure following the signing of the Treaty of Aachen in January 2019.