On the occasion of the European Heritage Days, come and discover the history of the former priory of Saint-Martin-des-Champs and its refectory. Built around 1230, since 1852 it houses the central library of the Conservatoire national des arts et métiers. Discover also, on the occasion of this visit, the exhibition "La fabrique des couleurs" devoted to the natural and artificial dyes used in dyeing and the evolutions that have changed this industry in the course of the 19th century. Guided tours on registration of the former refectory:

• Saturday from 9.30 am to 12 pm