The oldest part of the complex is the east wing which was commissioned by Bernardin Gigault de Bellefonds, who was a Marshal of France and head of the Maison du Roi (royal household) under King Louis XIV.

[1] During the French Revolution, the building was abandoned but, in 1790, town council, which had previously been accommodated in the Hôtel du Garde-Meuble in Rue des Réservoirs,[3] decided to use it for meetings.

The new structures were designed by Henry Legrand in a similar style and construction to the original east wing and were officially opened by the mayor, Edouard Lefebvre, on 18 November 1900.

The central section of five bays featured a short flight of steps leading up to three round headed openings with voussoirs, keystones and iron grills.

The windows on the first floor were flanked by pairs of banded Corinthian order columns supporting a frieze, a modillioned cornice and a balustaded parapet.