To write the history of the Luxembourg mines you need many different sources, and photos are among the most interesting. Using the example of some pictures from the archive of the MNM, Denis Klein shows the difficulties of taking photos in a mine containing the information that the historian can draw from the images. The conference takes place on Thursday, January 30^th at 8 pm in the multipurpose room of our reception building. Language: Luxembourgish. Everyone is welcome. The admission is free.