Bloc de la Limite No. 551 (Maginot Line)

Silent witness to the Maginot Line.
Historical explanation: The purpose of the line was to protect France against a surprise attack such as that which had occurred in the Franco-Prussian War of 1870, in which France had lost Alsace and part of Lorraine to Germany. When Alsace and Lorraine came fully back to France after the First World War, the old defenses were not only outdated, but also located too far from the new border. Moreover, France had lost so many soldiers in the First World War that the borders could not be adequately defended without additional measures.The French Minister of War Paul Painlevé was the driving force behind the line, but eventually his successor and war veteran André Maginot submitted the plan for construction to the French Parliament in 1930. His project costing 2.9 billion francs (today: 1.5 billion euros) took a heavy toll on the French economy, precisely at a time of economic crisis. However, defense against Germany was considered vital, especially when Adolf Hitler came to power. In addition, it provided 20,000 jobs and electrified the border areas.
Source: nl.wikipedia.org/wiki/Maginotlinie

The bunker is called " Bloc de limite No. 551