The Terre Arnolfe identify a historical division of Umbria located between Martani mountains and Montecastrilli, Acquasparta, Avigliano Umbro. The ancient capital was Cesi (TR) and the name “Terre Arnolfe” comes from the descendants of Arnolfo. He became a vassal of the church and the feudal lords of this land, that was named after him.
“Terre Arnolfe” passed from being under control of the emperor Henry II (the last king of Germany) to the Church. Pope Innocent III in 1199 appointed there the first Rector, the cleric Roberto Malvano, directly subject to the Apostolic See. Many castles in the area of Terre Arnolfe passed under the powerful city of Todi by the end of the Middle Age.