WN 171 Brautnacht is a German World War II bunker located in northern France, part of the Atlantic Wall coastal defense system. Built by Nazi Germany between 1942 and 1944, this fortification was designed to protect the coastline from potential Allied invasion. The bunker's name 'Brautnacht' (German for 'wedding night') follows the German military practice of assigning codenames to defensive positions.
The structure represents the extensive network of fortifications constructed along the French coast during the occupation, serving as a key component of Germany's defensive strategy in occupied France. These bunkers were typically built to house artillery, machine guns, and observation posts, forming an integrated coastal defense system.