The Sanctuary of Vescovio is one of the most important of Sabina's monuments, it is located in an area where once used to stand the Roman Municipality of Forum Novum.

The first references to Santa Maria di Vescovio, the Cathedral of the Sabine till 1495, when the Diocesan Headquarters was moved to Magliano Sabina, date back to the VIII century. It was devastated by the Saracens in the IX century; it has since been rebuilt and restored a number of times. What the visitors sees today is a church that has preserved intact its XII century Romanic characteristics.

Of great beauty is the Torre Campanaria - the bell tower, with its five tiers of windows that was erected after the church was completed, using as masonry fragments of marble plaques and sculptures recovered on the spot.    

The interior has only one nave decorated with thirteen century frescos of the school of the Roman painter Cavallini; they represent scenes of the New and Old Testaments.

Two passages, situated in the presbytery give access to the semicircular XI century crypt situated below the altar. It was built on a previous church which in its turn had been built on a Roman house.

On a little hill not far off are the remains of a convent built to house the monks supposedly looking after the church at the times of Pope Clement VIII, towards the end of the XVI century.

The Sabine historian Renzo Di Mario, in his "Ritratti Sabini" mentions the fact that St. Peter lived in Sabina for a short while, precisely at Forum Novum. According to tradition he came to testify the Words of Christ and was a guest of the Ursaci family. It is believed that he celebrated the ceremony of Fractio Panis, as the Holy Eucharistic was known in the house below where the crypt is now located.