Abstract
Historical photographs and film footage, which have survived over time because they are stored in historical archives, are in many cases the only traces of monuments that no longer exist. Thanks to Photogrammetry and Artificial Intelligence, applied to these sources, it is possible to document and to 3D virtually reconstruct lost architecture in order to preserve their historical memory. The presentation aims to give an analysis and assessment through the extraction of metric information from historical images and to experiment with its potentialities in the heritage field with the purpose of valorising historical iconographical documentation.