La Coupole, also known as the Coupole d'Helfaut-Wizernes, is a massive Second World War bunker complex located in the Pas-de-Calais department of northern France. Originally codenamed Bauvorhaben 21 or Schotterwerk Nordwest, this fortified structure was designed by Nazi Germany as a launch facility for V-2 rockets targeting England. Situated approximately 5 kilometres from Saint-Omer and 14.4 kilometers south-southeast of the English Channel, the site represents one of the most ambitious military engineering projects of the Atlantic Wall.
Today, La Coupole serves as a museum and historical memorial, preserving the memory of the region's wartime significance and the technological advances of the era.