The prehistoric flint mine in Spiennes made the pages of archaeological history 150 years ago. The discovery of mining shafts and underground galleries dating to the Neolithic period was a world sensation in 1867 and it initiated archaeological research into ancient mining in Belgium, Great Britain and other countries. Once the Neolithic remains of striped flint exploitation were discovered in 1922 in Krzemionki Opatowskie, the Spiennes shafts and flint workshops became an important point of reference for the mine in Polish territory. The prehistoric mine in Belgium was listed on the World Heritage List in 2000, confirming its exceptional importance. Now the Krzemionki Prehistoric Striped Flint Mining Region is in the running for the same recognition. In this context the article presents the history of archaeological research in Spiennes through the beginning of the 21st century.