Luis G�mez was born c.1482 in Orihuela, Valencia. After his initial studies close to home, he pursued the study of civil and canon law at the University of Bologna before moving to Padua to take up a teaching position by 1522. There he is known to have lectured on the Institutes of Justinian as well as canon law. By 1528, he was serving at the papal court in Rome as an auditor of the Rota, that is, a judge in one of the papal tribunals called the Sacra Romana Rota. He then became director of the Penitenzieria Apostolica (the Apostolic Penitentiary), which was a papal tribunal with jurisdiction over such matters as the issue of indulgences and absolutions from excommunications. In 1534, he was made bishop of Sarno, located east of Naples. As attested in an epigraph from a church in Orihuela, he died in 1542 in the city of Macerata in the Marches and was buried in its cathedral. Chiara Bariviera studied classical archeology and worked at La Sapienza University of Rome on research projects in Rome, Pompeii, and Veii. Her studies center on Roman topography and the development of urban landscapes, with a special interest in public architecture and the reconstruction of monumental complexes. Pamela O. Long is a historian of late medieval and early modern European science and technology, and cultural history. Her fellowships include those from American Academy in Rome, the Guggenheim Foundation, the John D. and Catherine T. MacArthur Foundation, and the Institute for Advanced Study at Princeton. Her books include Openness, Secrecy, Authorship: Technical Arts and the Culture of Knowledge from Antiquity to the Renaissance (2001); Artisan/Practitioners and the Rise of the New Sciences (2011); and Engineering the Eternal City: Infrastructure, Topography, and the Culture of Knowledge in Late Sixteenth-Century Rome (2018).