Advances in materials and technological characterization of Lorenzo Ghiberti’s Gates of Paradise Emilio Mello, Eleonora Di Paola, Gianluigi Marra and Mario Salvalaggio Eur. Phys. J. Plus, 136 8 (2021) 861 Published online: 20 August 2021 DOI: 10.1140/epjp/s13360-021-01851-9