Gregorii Iv, Sergii Ii, Pontificum Romanorum JonÃ], Freculphi, Frothar

This comprehensive volume, written in Latin, collects the complete works of Pope Gregory IV and Pope Sergius II, along with writings from Jon ], Freculphi, Frotharii, Aurelianensis, Lexoviensis, and Tullensis.

Compiled according to Mansi's extensive collection and editions by Surius, Muratorius, Ughelli, Pezii, Mabillo