Rocchetta di Cesi

History

The fortress was probably erected in the 11th century on a site that had been fortified since antiquity.

In documents of the 11th century the site appears under the name Civitella. Around 1052 Albertus and Arnulfus donated the church of San Salvatore at Civitella, “on the mountain above Cesi,” to Montecassino Abbey. In 1093 the sons of Arnulf confirmed and expanded these donations, mentioning a monastery at Civitella. Modern scholarship identifies this site with the present Rocchetta di Cesi.

During the conflict between Frederick Barbarossa and the Papacy, the Rocca di Cesi was occupied in 1177 by imperial forces. In 1198 Conrad I, Duke of Spoleto and Count of Assisi, was compelled by Pope Innocent III to return it to the Apostolic See. The fortress was thereafter guarded as one of the key papal strongholds in Umbria.

A bull of Gregory IX in 1235 confirmed the Rocca di Cesi among the fortresses that could not be alienated from papal control. During the pontificate of Urban IV the fortress was maintained through revenues assigned from local churches, including San Benedetto di Calcaria and Sant’Erasmo, although these were later restored to Montecassino by Clement IV.

In 1276 the castellan was Fra Giovanni, a Hospitaller knight, who also held the rectorship of the Terre Arnolfe and the abbey of Ferentillo. Local communities swore fealty to him as the papal representative.

Under Nicholas III the castellany was again entrusted to a Hospitaller, Zampo, who received oaths of obedience and taxation from nearby villages. By the 13th century, the church of Sant’Erasmo, situated near the Rocchetta, had replaced San Salvatore as the main ecclesiastical foundation of the area.

Imperial diplomas continued to confirm papal possession: in 1312 Henry VII granted the fortress of Cesi with the Terre Arnolfe to Clement V; the act was renewed by Louis IV in 1336 and by Charles IV in 1368.

In the early 14th century, during the pontificate of John XXII, the Rocca di Cesi was taken from the sons of Andrea Cesi, who had held it as vicars of the Terra Arnolfa. It was recovered for the Church by Bishop Guido Farnese and entrusted to a custodian named Matteo. Shortly afterwards, the fortress passed under the control of Todi, whose authorities obtained its delivery for 200 florins, and placed it under close municipal supervision. …

Architecture

The fortifications of Cesi are considered a notable example of medieval military engineering. They consist of the Rocca and a series of towers arranged along a curtain wall that runs east–west between 787 and 660 meters above sea level. Built on the rocky spur of Monte Eolo, the defensive system exploited the natural characteristics of the terrain to create a stronghold considered virtually impregnable.

At least two towers dating from the 11th century, reinforced in the 13th century, are still visible along the ridge. A pentagonal tower functioned as the mastio (keep) of the fortress. These towers, connected by crenellated walls descending along the ridge of Monte Sant’Erasmo, formed a defensive system that allowed the Rocca di Cesi to dominate and control the surrounding Terre Arnolfe.

Conservation

The fortification is publicly owned and falls under tutela ope legis (legal protection). Its state of conservation is classified as very poor.

A restoration campaign completed in 2025 consolidated the medieval towers and curtain walls, long at risk of collapse. The project also reopened the historic sentiero delle torri (trail 674), which links the Rocca, the towers, and the area of Sant’Erasmo, providing access to the defensive structures and panoramic views of the Terni valley.