The Condition des soies, built between 1804 and 1814, was an institution which measured the dry weight of silk to determine its humidity level for commercial approval. This historical monument, of Florentine style, has a sumptuous door, a grand staircase and a beautiful row of arches on the first floor. A large mural in the reception shows the itinerary of the Silk Road. The building now houses associations and services of the first arrondissement.