Nz 345

A military structure located near Saint-Nazaire, France, identified by the designation 'Nz 345'. The precise function and historical context of this site are not confirmed by the provided search results, which discuss France's broader nuclear weapons program and policy. The location falls within a region that saw significant military infrastructure development during the 20th century, including German fortifications from World War II and potential Cold War sites, but no specific details linking this designation to a known bunker type, era, or operator are available in the supplied information.