A military structure identified by the German designation 'OB 15,5cm Geschütz umgebaut auf 21cm' is located at the provided coordinates in Normandy, France. The name suggests a possible World War II-era German artillery modification or bunker type, referencing a conversion from a 15.5cm to a 21cm gun. However, the provided web search results contain no specific information confirming the existence, history, function, or current state of this particular site.
No architectural details, construction date, or historical context can be verified from the available data. The location's precise nature and significance remain unconfirmed.