Attribution 4.0 International (CC BY 4.0)
You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence. Read more about this licence.
Credit
Pope Gregory XIII appointing the principal of the Ospedale Santo Spirito in Sassia, Rome. Photograph by Ditta Vasari, 19-- (?) after a fresco painting. Wellcome Collection. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.