Inside the lovely Palazzo Caputi, in Ruvo di Puglia, visitors will find the Book Museum and House of Culture, which hosts a very large collection of volumes, making it one of the cornerstones of local culture.

The Cathedral stands on the highest and oldest part of the town, and is also home to important historical and cultural buildings. It houses the administrative offices of the municipality, the ancient castle (known as the Colaneri palace) and, attached to the cathedral, the Curia building and the Episcopal seminary. Catholic life in Trivento is based in the oldest diocese in Molise, and the municipality has been an episcopal seat since the early Christian era. The cathedral church is dedicated to the patron saints Nazarius, Celsus and Victor: according to tradition, the relics of the martyr saints Nazarius and Celsus were donated by Saint Ambrose to the local church in 398. In 1726, the pope and martyr Saint Victor was also added to the two Milanese martyrs. Together with the cathedral's owners, Saint Casto, Trivento's legendary first bishop, is co-patron of the diocese.