The Ex Stabilimento Elettrochimico di Papigno is a former electrochemical factory located in the village of Papigno, near the city of Terni in central Italy. The plant was built at the end of the 19th century, during a period when Terni was rapidly developing into one of Italy’s major industrial centers.

The location was chosen because of the nearby Cascata delle Marmore. The waterfalls provided a large amount of hydroelectric power, which was essential for electrochemical production processes. Using this energy source, the factory produced materials such as calcium carbide, chlorine and other chemical compounds used in industry and agriculture.

During the first half of the twentieth century, the Papigno complex expanded and became an important industrial site in the region. The factory included several large production halls, electrolysis installations, storage buildings and power infrastructure. Together with the steel industry in Terni, it formed part of a wider industrial area that employed many workers and contributed significantly to the economic development of the Umbria region.

From the 1960s onward the importance of the plant gradually declined. Changes in industrial technology, new production methods and stricter environmental regulations made the operation of the facility increasingly unprofitable. The electrochemical plant eventually closed in the 1980s.