Toward the end of World War One French engineers built a second Paris.
Not a real city. A phantom one. A careful illusion designed to fool German bombers flying at night into dropping their explosives on empty countryside instead of the real French capital.
The project was conceived in 1917 and construction was underway in 1918 when the war ended before it could be fully tested in operation. But it was real, it was detailed, and it represents one of the most remarkable feats of military deception in history.
What They Built
The fake Paris was constructed on the outskirts of the city, near the town of Maisons-Laffitte to the northwest. The designers understood that German pilots navigating at night used lights and landmarks to identify their targets.
So they built landmarks.
Workers constructed a replica of the Gare du Nord railway station including fake platforms and rooftop structures that would look like the real thing from the air. They built a facsimile section of the Champs-Elysees with the avenue's characteristic dimensions and layout reproduced in wood and canvas. They erected dummy factory buildings and industrial structures.
Then they lit everything.
The fake city was illuminated in a pattern designed to mimic how Paris looked from the air at night. Translucent panels and strips of lights simulated the glow of streets and windows. The effect from altitude was meant to be convincing enough that a German airman would mistake it for the real city.
Why This Was Necessary
By late in the war German long-range aircraft and dirigibles had been bombing Paris and other French cities with increasing capability. The psychological effect of aerial bombardment on civilian populations was understood even then as a significant weapon of war.
The French could not simply turn off all the lights in Paris. The city had to function. Factories had to run. The civilian population had to live. Complete blackout was not practical.
The alternative was misdirection. Give the bombers a target that looked real and put it where bombing it would hurt nothing.
The war ended in November 1918 before the fake Paris could be fully evaluated in combat conditions. But the concept it demonstrated, that elaborate physical deception could protect real targets by creating convincing dummy ones, became a standard part of military thinking in the conflicts that followed.
In World War Two both sides used inflatable tanks, fake airfields, and dummy installations to mislead reconnaissance aircraft and bombers. The idea had French origins from a project that most people have never heard of.
Robert Lee Beers III is a writer and digital preservation advocate based in North Charleston South Carolina.
