The southern ambulatory of the Colosseum in Rome has been restored through an intervention led by Stefano Boeri Interiors, a multidisciplinary studio founded by architects Stefano Boeri and Giorgio Donà, for the Parco Archeologico del Colosseo, focusing on the reconstruction of the crepidine and the repaving of missing sections to reinstate the monument's original ground levels and improve the legibility of its southern perimeter. The project builds on an archaeological investigation campaign that informed both the geometric definition of the intervention and its material articulation.