The Arthur de Buyer Coal Mine, or coal mine #11, was one of the major Ronchamp coal mines, which is in the area of the commune of Magny-Danigon in the French region of Franche-Comté. Digging started in 1894 in an attempt to ensure the future of the company, which was in a difficult position at that time. The project was directed by Leon Poussigue, director of the company since 1891. He was responsible for organizing the excavation, designing buildings and installing each machine. The seat is named as a tribute to Arthur de Buyer, the president since 1876. He retired during the commissioning activity of the mine.