"The 41" refers to a striking event of the First World War: the bombing of Belfort by the Grand Canville of Zillisheim. This military harassment gave rise to 41 shell impacts in the territory of Belfort, impacts which were referenced on a map by a French soldier in 1920. The map is kept in the departmental archives which also have testimonies of inhabitants of this period.
The artist Raphaël Galley imagined an artistic journey that links each impact of shells. At the very place where the shells of the Grand Canon have fallen, it installs a boundary carved in pink sandstone from the Vosges and oak, about 1.20 m high, at the top of which is dug a sink that recalls the crater generated by the fall of the shell.