In Sommevoire (Haute-Marne), the GHM foundry manufactures public lighting equipment and urban furniture. GHM also designs and produces cast-iron line support masts for tramways and railways. From the outset, the company has been involved in prestigious projects in France and in many capitals around the world (lighting of the Champs-Élysées, Alexandre-III bridge, Guimard metro entrances). It also produces collections of cast iron, aluminium, and steel candelabras. The foundry is listed as a ‘Entreprise du Patrimoine Vivant’ (Living Heritage Company).