Named Moulin de Chambon or Priory, this factory was certainly, following the Fouleret Mill, now extinct, one of the oldest in the Cisse Valley. Indeed, it depended on the manse attributed to the abbey of Marmoutier on December 13, 832 by Emperor Louis the Pious and his wife Judith. It was in turn a wheat mill, in tan for Blésois tanners then chocolate factory. From 1872, it became the first plant for crushing cocoa beans and manufacturing Poulain chocolate, which then established its main plant on Blois around 1880. It became a wheat mill again in 1920 and finally stopped its grinding wheels around 1960.