Highlights: Despite being a transcendental cultural manifestation in the history of humanity, there are hardly any open-access virtual repertoires of Palaeolithic art. The numerous photogrammetric studies carried out in successive archaeological campaigns to answer scientific questions can be used in educational and dissemination projects. In the framework of the authors’ outreach project called "PaleoArt-3D: regreso al pasado" a virtual museum has been created to make Palaeolithic art a more accessible and democratic heritage. Abstract: Palaeolithic art is a cultural manifestation of great importance to understanding the early history of our species. Through this artistic phenomenon, one can study aspects such as long-distance contacts, evidence of learning or the perception with which Palaeolithic humans were able to execute and memorise such precise details. However, there are few virtual repertoires that offer collections of Palaeolithic art. Accessibility to this type of archaeological remains is even more difficult considering conservation is prioritised over tourist visits. For these reasons, Palaeolithic art is today a type of cultural asset that is largely unknown to the population. The project "PaleoArt-3D: regreso al pasado" was created with the aim of democratising this heritage and making it more accessible. To this end, a virtual museum has been developed to exhibit digital models of parietal and portable art with complementary annotations for each one. The methodology includes a first stage dedicated to digitising examples of Palaeolithic art in caves or open-air stations and exhibited in Spanish and French museums. Next, the necessary infrastructure was designed to house the exhibition using specific software such as Blender. Post-processing tasks were carried out to reducing the number of polygons without losing quality. Finally, the museum has been uploaded to the Sketchfab platform to make it freely available online. It is hoped that this virtual museum will contribute to promoting and creating a more significant number of digital resources related to Palaeolithic art that are easily accessible to the public.

The characterization of the first portable artistic depictions in Cantabrian Spain is crucial for comprehension of the symbolic development of Neandertals and Homo sapiens in the context of the passage from the Middle to the Upper Paleolithic. However, despite the importance of these first graphic representations, their study has tended to lack the application of suitable methodologies to be able to discriminate between graphic activity and other kind of alterations (use-wear, taphonomic, or post-depositional). The present study has examined a significant sample of Middle and Upper Paleolithic lithic and osseous objects from Cantabrian Spain that have been cited as evidence of graphic activity in the literature. The contexts in which the objects were found have been considered, and the objects have been analyzed through the microscopic observation of the marks to distinguish between incisions, pecking, and engraving made for a non-functional purpose (graphic activity) and those generated by diverse functional actions or taphonomic processes (cutmarks, trampling, root marks, percussion scars, and use-wear). The results show that some regional Middle Paleolithic osseous objects display incisions that are neither functional nor taphonomic and whose characteristics are similar to graphic evidence attributed to Neandertals in Europe and the Near East. In turn, the first portable art produced by Homo sapiens in the Cantabrian Spain seems to be limited mostly to linear signs, and no figurative representation can be recognized until the Gravettian. This appears to indicate a particular idiosyncrasy of the region in the Early Upper Paleolithic, which, in comparison with other regions such as south-west France and the Swabian Jura, shows a later and less abundant production of portable art.