In 2023, the Heritage and Inventory Department of the Centre-Val de Loire Region carried out a 3D model of the crypt of the Saint-Nicolas church and its famous murals. This two-part presentation (researcher responsible for the church inventory study and apprentice 3D model designer) present the state of knowledge on the iconographic program of the frescoes and trace all the stages of manufacture of the model and its possible uses for research and the general public.