Fort de Condé-sur-Aisne, Military fortification and museum in Condé-sur-Aisne and Chivres-Val, France.

Fort de Condé is a five-sided masonry fort on a flat-topped rise above the Aisne and Vesle valleys, built by Dollot and Fortier. Its rough light-grey and tan walls form a broken ring around a grassy courtyard, with an arched opening on one side and a grass-topped parapet. Two double caponiers and a single caponier cover the approaches, and two Mougin casemates were built for 155 mm guns.

Built from 1877 to 1882 by contractors Dollot and Fortier for 1,850,000 gold francs, the fort was named in 1887 after General Louis Antoine Pille. Judged obsolete before completion, it was decommissioned in 1912. In September 1914 it was taken without resistance by the Germans, retaken by French and British forces, then lost again; it served as a German hospital until the Chemin des Dames offensive of 16 April 1917. Generals Pershing and Franchet d'Espérey watched the fighting from the post in October 1917. The Germans retook it on 28 May 1918 and France recovered it on 7 August 1918.

The fort's name honours General Louis Antoine Pille, to whom it was dedicated in 1887. Since 2003 the site has hosted craft fairs, theatre, exhibitions and son et lumière shows, drawing about 12,000 visitors a year. A commemorative plaque recalls the 18 December 1953 accident that killed Gustave Rouxhet, Joseph Gronowski and Marceau Dagry.

The access road starts from Chivres-Val, and the site is easiest to reach by car. Visits run from 2003 onward, with roughly 12,000 visitors a year, so check opening times with the local tourist office before setting out. The fort covers 17 hectares, and the underground rooms stay cool even in summer.

The fort was bought by the commune of Chivres-Val in 1959 and used as a stone quarry. A plaque on the site recalls an accident on 18 December 1953 that killed Gustave Rouxhet, Joseph Gronowski and Marceau Dagry. In October 1917 Generals Pershing and Franchet d'Espérey watched the fighting on the Chemin des Dames from this post.