Paulus Diaconus, who wrote before the empire of Charlemagne describes Rome as his subject city — vestrae civitates (ad Pompeium Festum) suis addidit sceptris (de Metensis Ecclesiae Episcopis.). Some Carlovingian medals, struck at Rome, have engaged Le Blanc to write an elaborate, though partial, dissertation on their authority at Rome, both as patricians and emperors (Amsterdam, 1692, in 4to.).