Photogrammetry and 3D printing for conservation and disclosure of Cultural Heritage

New technologies can help in documenting, preserving and disseminating cultural contexts. Although photogrammetry is a well-known technology for preserving cultural heritage, its combined use with 3D printing is worthwhile to simultaneously provide a digital twin for conservation and restoration purposes and for disclosure of Cultural Heritage. The possibility that 3D printing gives in the field of Cultural Heritage is wide and goes from the creation of small models for bookshops to scaled models for helping blind people to visualize sculptures or artistic artifacts through touch. They can also be valuable resources for all museum visitors allowing them to experience the monument or artefact. This paper presents the pipeline followed for the survey and the creation of high- and low-resolution models of the Tomb of Giulio II in Rome, providing on one hand the Superintendence with a 3D model useful for study and virtual restoration, and on the other blind people with an accurate 3D printed model for enjoying and understanding the monument. Each step of the process is explained highlighting the critical passages starting from the difficulties during the 3D survey to the creation of an accurate 3D reality-based model to the production of a valuable 3D printed model