The site of Krems-Wachtberg is one of the most important Palaeolithic open-air sites in Central Europe. Particularly noteworthy are the unique infant burials, as well as a complex multiphase hearth and various pits that characterise the well-preserved occupation horizon. The first volume of the final publication on the Gravettian site Krems-Wachtberg 2005-2015 presents the results of the examination of more than 44000 lithic artefacts. The work focuses on the characterisation of the raw materials and their provenance, as well as techno-morphological analyses of the blanks and the modified tools. The lithic assemblage is evaluated according to its relevance for Krems-Wachtberg itself and correlated with materials from the wider archaeological landscape, i.e. other Paleolithic sites. Selected refittings and the spatial distribution of various stone artefacts are the foundation for reconstructing settlement structures, activities and formation processes of particular layers. The present work will allow future comparative studies with other Upper Paleolithic lithic assemblages.