The Fort de Domont was built following the Franco-Prussian War to defend Paris.
It was built between 1875 and 1879 in accordance with improved principles of fortification developed for the Séré de Rivières system.
The fort covered an area of 12 hectares (30 acres) and its garrison comprised 1175 men and officers.
[1] The fort was used by the French Post (PTT) as an ionospheric research station during the 1950s, followed by the Ministry of Agriculture.
The fort was briefly used by a private company for radiography work in the 1990s before it became a training center for the fire services in 1993.