The collegiate church is extremely old. The original Romanesque church was built in 1509. Its status of exceptional collegiate church was granted by Pope Benoit XIV on 6 December 1749, and confirmed by Pope Clement XIII on 6 May 1766. It was restored in 1970.
Its façade dates from 1509 and its Nicolas Filippi Way of the Cross from 1746. It contains a tabernacle with twisted columns, inlaid wood and varnish from the 18th century (listed), numerous paintings including "The Last Communion of a Holy King", oil on canvas from the 17th century (listed) and the shrine of the relics of San Vittoriu, a martyr from the end of the 3rd century. The church has a historic Crudeli organ (1810) and a gallery (1821) by Anto Giuseppe Saladini, born in Speloncato. It is the seat of the Oratory of the Confraternity of Santa Croce.