BCSF-Rénass, the French Central Seismological Bureau and National Seismic Monitoring Network, has been responsible for estimating macroseismic intensities in France since 1921. Its archives are all the documents resulting from macroseismic surveys carried out since that date (forms, letters, maps, newspaper articles, macroseismic reports, etc.). Between 1921 and 1996, 960 earthquakes were surveyed to estimate macroseismic intensities (severity of ground shaking) by sending paper forms to the municipalities (Sira et al. 2021a). This represents 29 linear meters of archival documents. The aim of the MacrosisData project is to safeguard, disseminate and promote this collection, unique in France, through an online database. The web interface for consulting documents via the TGIR Huma-Num data portal is currently under development (https://huma-num.fr).