This data set comprises georeferenced GPR time-slices (GeoTIFFs) from Interamna Lirenas, as well as interpretation  diagrams based on the time-slices. The georeferenced time-slices are from five different fields, and can all be found in the folder 'Georeferenced_time_slices_Interamna_Lirenas'. The metadata files, describing how the GPR data were collected and processed, are in the folder 'Geophysics_metadata_Interamna_Lirenas' (one metadata file in .csv format for each of the five fields). The interpretation diagrams include the complete survey area (all five fields), and are in the folder 'Interpretation_of_time-slices'. This folder also includes a .csv file 'Vector_metadata_Interamna_Lierenas_(all_fields).csv' including the metadata on the interpretation.