The world of metallurgy can seem dull and dark. In the GHM factory in Sommevoire (Haute-Marne), metal is king. Whether molten or hammered, it imposes its own laws. This atmosphere, both hot and cold, resonates with the metallic sounds of the different phases of art casting. Casting was discovered in China during the Warring States period (4th century BC). In Europe, it was during the 19th century that it became an essential part of the economy thanks to the widespread use of coke in blast furnaces.