Co-Cathedral of St. Peter the Apostle, Co-cathedral in Terralba, Italy.

The Co-Cathedral of St. Peter is a baroque church with a rectangular layout and a prominent central nave that runs the full length of the building. Inside, the space features rich decoration and multiple altars adorned with religious artworks and sculptural details.

A Romanesque cathedral built in 1144 under Bishop Mariano I stood here until the early 19th century, when its poor condition led to demolition. Reconstruction began in 1820, with the nave and side chapels raised between 1822 and 1833. The transept was finished in 1912, the Romanesque apse demolished in 1927, and the church consecrated in 1933 as co-cathedral of the Diocese of Ales-Terralba.

The church brings together the local community during religious celebrations and festivals, where people gather to observe Catholic traditions. It remains an active center of worship and communal life in the town.

The church is open to visitors during scheduled services and prayer times, offering opportunities to attend regular masses. It is advisable to check ahead to ensure the building is accessible at your planned time of visit.

The church keeps capitals recovered from the demolition of the 1144 Romanesque apse, which came from Neapolis. It also holds a 1626 baptismal font, a 17th-century wooden pulpit and a Spanish silver cross. The wooden statues of St. Peter, the Madonna of the Rosary and the Madonna of Remedy also date from the 17th century.