Fort d'Issy
Open-knowledge reference entry
Fort d'Issy was one of the fortifications of the city of Paris, France, built between 1841 and 1845.
It was one of six forts built to the south of the main wall around the city.
The fort was placed too close to the city to be effective, and had a poor design that did not take into account recent experience of siege warfare.
It was quickly silenced during the Franco-Prussian War of 1870–71.
After the armistice of February 1871 the fort was defended by National Guards of the Paris Commune against the French regular army in April–May 1871.
The defense was irresolute and the fort was soon occupied.
Today the site of the fort is an "eco-district", an ecologically friendly residential area.
Background
In 1814 and 1815 Paris was twice occupied by a coalition of British, Austrian, Russian and Prussian forces at the end of the Napoleonic Wars.
After the restoration of the Bourbon monarchy, and particularly after the July Monarchy came to power in 1830, there was growing demand for construction of fortifications around Paris.
Tension rose during the Oriental Crisis of 1840.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 15, 2026. The linked authority identifier is Q3078131. Authority coordinates are 48.817, 2.269. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1841, 1845, 1870 and 1871.
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This entry incorporates text from “Fort d'Issy” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.