Fort National
Saint-Malo, France · built 1689
Fort National is a fort on a tidal island a few hundred metres off the walled city of Saint-Malo. The great military architect Vauban had it built in 1689 to protect Saint-Malo's port. The fort was originally called Fort Royal. In 1789 the fort's name became Fort d'Îlette or Républicain, then Fort Impérial and, after 1870, Fort National.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).