Cuivrerie de Cerdon, Copper factory in Cerdon, France.

Cuivrerie de Cerdon is a former copper and nickel-silver factory set around a paved courtyard in Cerdon. The complex includes a tan two-storey building with a tiled roof, a dark red double door and a hanging bell, a taller tan building with two round attic windows, and a white building with a steep brown tiled roof bearing the sign "La Cuivrerie de Cerdon". A large copper-coloured fountain bowl stands in front.

Charles Eugène Main and his sons Joseph and Charles Eugène founded the copper works in 1854 in an old paper mill on the Suisse stream, whose waterwheel drove the polishing drums. A second wheel was added in 1860 for the six trip hammers, and in 1871 the works supplied 300 copper basins to the Tomioka silk mill in Japan. Around 1900 some 80 workers were employed; after liquidation in 1979 the site reopened as a museum in 1980, closed in 2010, was listed as a monument historique in 2013 and was bought by the Département de l'Ain in 2017 before reopening in October 2022.

Workers from Cerdon were nicknamed "Magnins", and by the early 20th century the copper beaters and turners of the village had a reputation abroad. The factory made trays, tea pots, coal braziers and hot-water bottles for Algeria, Tunisia and Lebanon, and copper basins for the silk industry. In 1871 it supplied 300 copper basins to the Tomioka silk mill in Japan, now a UNESCO World Heritage site.

The complex sits in the village of Cerdon, in the Ain department, on the stream called La Suisse that once powered its wheels. The site reopened to the public in October 2022 after renovation, with a museum layout using augmented-reality devices. The three waterwheels and the mill channel are out of service and await restoration, so they are seen rather than running.

The 150-tonne stamping press arrived from the United States in 1924 and took six months to assemble; in three seconds it shaped a metal disc that a worker would have needed more than five hours to form by hand. The three waterwheels and the mill channel are now out of service and await renovation.