Chocolaterie Poulain in Blois, Historical chocolate factory in Blois, France.

Chocolaterie Poulain is a former chocolate factory in Blois featuring classical architecture with large windows and carefully crafted stone facades along Avenue Gambetta. The building displays the craftsmanship and design typical of 19th-century French industrial structures.

Auguste Poulain founded his chocolate factory at the Villette site in 1872, expanding from his original shop on Rue Porte Chartraine. This location became a major center of French chocolate production through the 19th century.

The site is still called Poulainville, and the rue de la Chocolaterie recalls the factory that gave the district its name. Since 1993 the Beauséjour grounds have housed the Blois campus of INSA Centre-Val de Loire, founded as the École d'ingénieurs du Val de Loire. Part of the buildings was inscribed as a monument historique in 1997.

The building now serves as office space for educational institutions and can be viewed from Avenue Gambetta. Visitors can best observe the architectural details from the street and appreciate the stonework craftsmanship of the exterior.

The Château de la Villette, the complex's main building, stands higher than the rest so it could overlook the works, and a long avenue faces it, giving the factory the layout of a château with wings. A low wall and wrought-iron gate close the site. The Beauséjour works, built in reinforced concrete with the Hennebique system, burned down on the night of 7–8 July 1918 and was rebuilt the same year.