Direction de la surveillance du territoire

The Direction de la surveillance du territoire headquarters sits behind a massive, windowless perimeter wall on the Rue des Saussaies. This building served as the operational heart of France's counter-espionage agency for decades. During the Cold War, agents inside monitored foreign diplomats and suspected subversives from these offices. The agency officially merged into a larger internal security directorate in two thousand eight, but the building remains associated with the intense secrecy of the French state during the twentieth century.