La Macérienne, Industrial heritage site in Charleville-Mézières, France.

La Macérienne is an industrial complex made of yellow stone with large bay windows and ornate carved details along the roofline. The building spreads across several sections with distinctive features typical of late 19th-century factory design.

Mézières was declassified as a fortress in 1884, and mayor Marie-Georges Mialaret bought cheap military land by the Meuse, adding a pond and canal to supply power. Adolphe Clément built La Macérienne there in 1894 for bicycle parts, then from 1897 made Clément-Gladiator cars. In 1903 he lost the Clément name and took Bayard, after the knight's statue facing the works. German occupation sent the machines to Germany in World War I.

The factory shows how industry and architecture worked together in this region. Visitors can see how the building combined practical working spaces with decorative stone details that gave the facility a sense of solidity and pride.

The former factory stands on the banks of the Meuse, near the old ramparts of Mézières. Its office wing has housed municipal services since the 2000s, while the surrounding wasteland hosts the Cabaret Vert festival each year. The site is being redeveloped for offices and a contemporary music venue.

The nickel-plating workshop stands behind the offices, on a trapezoidal plot between the former foundry and the great mechanical workshop. Its walls mix rubble and cut stone with brick infill, and metal beams serve as window lintels. The building has a single storey.