Fort d'Aubervilliers
Aubervilliers, France
The Fort d'Aubervilliers is a former fortification of Paris built for 1842 to 1846 in Aubervilliers to control the "route de Flandre", now Route nationale 2, to the northeast of Paris. The Fort d'Aubervilliers is part of the first ring of Paris fortifications outside the old city walls built by Adolphe Thiers in the 1840s to defend the capital against invasion and to control the city's rebellions.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).