Pope from 1740. He was an exemplary administrator, conciliatory in his dealings with the secular powers and concerned to strengthen the moral influence of the Papacy. His De Servorum Dei Beatificatione et Beatorum Canonizatione (1734–8) remains the classic treatment of the history and procedure of beatification and canonization. He also compiled an authoritative work on Diocesan Synods (1748), wrote on the Sacrifice of the Mass (1748), and issued a standard edition of the Caeremoniale Episcoporum (1752). He had a real interest in science and learning and founded a number of academies in Rome.