Donation of Sutri
The Donation of Sutri was an agreement reached at Sutri by Liutprand, King of the Lombards and Pope Gregory II in 728. At Sutri, the two reached an agreement by which the city and some hill towns in Latium (like Vetralla) were given to the Papacy, "as a gift to the blessed Apostles Peter and Paul" according to the Liber Pontificalis. The pact formed the first extension of papal territory beyond the confines of the Duchy of Rome and was the historical foundation of the Papal States.
Sutri retained its strategic importance as a fortified place near the borders of the Duchy of Rome.