The project aims to redevelop the green area around Mausoleum of Hadrian, transformed over time into Castel Sant'Angelo. The interventions will involve vegetation and architectural and monumental elements. These actions will include the reclamation and renewal of the tree stock, the reconstruction of the original vegetation and the improvement of grassland areas. Structural work will be carried out such as the restoration of floors, restoration of architectural artefacts and the inspection of installations, with the addition of furniture and signage. In addition, the dog and play area will be renovated with sustainable and decorative elements. The underground tunnels will be renovated and refitted for functional use.