Took advantage of the growing dissatisfaction on the part of the native clergy toward the papal government, and of Arcimboldi's interference in the Swedish revolt, in order to expel the nuncio and summon (1520) Lutheran theologians to Copenhagen.
The interests of the town were watched at the ducal palace by a nuncio and a solicitor; and this constitution remained in force till the fall of the republic.
He had long been archbishop of Florence and nuncio to Tuscany; and was entirely pro-French in his sympathies.
He filled the offices of apostolic vicar of Avignon, legate at the council of Trent, nuncio to Venice, and president of the Inquisition.
The papal nuncio at Prague, in particular, appears for a time to have obtained great influence over the king.
He studied at Bologna, Florence and Rome, and by his learning attracted the patronage of Alexander Farnese, who, as Pope Paul III., made him nuncio to Florence, where he received the honour of being elected a member of the celebrated academy, and then to Naples, where his oratorical ability brought him considerable success.
After the close of the diet the papal nuncio went to the Netherlands, where he kindled the flames of persecution, two monks of Antwerp, the first martyrs of the Reformation, being burnt in Brussels at his instigation.
Leo sent a new nuncio to Copenhagen (1521) in the person of the Minorite Francesco de Potentia, who readily absolved the king and received the rich bishopric of Skara.
According to the decision of the congress of Vienna the diplomatic rank of a papal nuncio corresponds to that of an ambassador.
He early entered the prelacy, became prefect of Spoleto, twice nuncio to France, cardinal (1606), and finally, on the 6th of August 1623, succeeded Gregory XV.