Ferrier of Tannerre-en-Puisaye

The ancient Ferrier of Tannerre-en-Puisaye is an iron mining and working site in Burgundy, France, dating from the Gallic and Gallo-Roman periods (7th century BC to 5th century AD) [1]. It is one of two largest ferriers in France and one of the largest in Europe, located in the Yonne department commune of Tannerre-en-Puisaye [1]. Industrial exploitation ceased when the site was designated a French Heritage monument in 1982 [1].