The Duchy of Rome (Latin: Ducatus Romanus; Greek: Δουκᾶτον Ῥώμης, romanized: Doukâton Rhṓmēs) was a state within the Byzantine Exarchate of Ravenna.

The same narrow strip of land broke the connection between their Duchies of Spoleto and Benevento and the main portion of the king's territories in the north.

However, Liutprand, softened by the entreaties of Pope Gregory II, restored Sutri "as a gift to the blessed Apostles Peter and Paul".

The Pope asked the Lombards for the return of Sutri for the sake of the Princes of the Apostles and threatened punishment by these sainted protectors.

In 738 the Lombard duke Transamund II of Spoleto captured the Castle of Gallese, which protected the road to Perugia to the north of Nepi.

[4] This caused the pope in 739 to turn for the first time to the powerful Frankish kingdom, under the protection of which Boniface had begun his successful labours as a missionary in Germany.

He sent to Charles Martel, "the powerful mayor of the palace" of the Frankish monarchy and the commander of the Franks in the famous battle at Tours, undoubtedly with the consent of the Greek dux, and appealed to him to protect the tomb of the Apostle.

He formed an alliance with Liutprand against Transamund, and in 741 received in return the four castles as the result of a personal visit to the camp of the king at Terni.