The episcopal see was then transferred to Bertinoro, and the bishop, Roberto dei Resinelli, an Augustinian, took with him relics of St. Rufillus.
In 1377 Roberto was succeeded by Bishop Teobaldo, who received from Pope Urban VI the civil authority over Bertinoro and Cesena, and fought against the bodies of mercenaries recruited by the Antipope Clement VII, by whom he was made prisoner.
Bishop Ventura degli Abati was highly praised by Pope Martin V for his learning and piety.
Tommaso Caselli, a Dominican (1544), was an able theologian; Gianandrea Caligari (1580), formerly nuncio to Poland, restored the Cathedral of Santa Caterina.
Giovanni della Robbia (1624), a Dominican, established at Forlimpopoli the Accademia degli Infiammati.