This work aims at presenting how we have developed the ShakeMap Atlas of historical earthquakes in Italy through the following steps: 1. the collection of macroseismic data for a selected dataset of historical Italian earthquakes with magnitudes equal to or greater than 6. 2. the adoption of two different ShakeMap configurations. 3. the application of the iterative leave-one-out cross-validation procedure within ShakeMap to identify the most appropriate configuration. 4. the analysis of the results. Acknowledgements A d d your information, graphs and images to this section.