Fort de Montrouge is a historic military fort located in Montrouge, a suburb of Paris, France. Built between 1841 and 1845, it was part of the Thiers Wall, designed to protect Paris from potential invasions. The fort features a star-shaped layout and was equipped with artillery to defend the city. During its operational years, Fort de Montrouge played a role in various conflicts, including the Franco-Prussian War. Today, it is no longer used for military purposes and has been repurposed for civilian activities, serving as a reminder of France's military history and architectural heritage.