One of the 406 mm S262 guns at the Lindemann Batterie near Calais in France. They were the biggest and most powerful on the Atlantic Wall, having originally been designed for the 130,000 ton H-class battleships. Lindemann Batterie is often seen in propaganda photos from the time, but is rarely mentioned by name. Sadly, the battery was buried by spoil coming out of the Channel Tunnel project in the 1980s.
View attachment 474277