The museum is housed in the former 12th-century convent adjacent to the church of Santa Maria della Verità in the center of town.

The museum was founded in 1955, and since 2011 has been dedicated to Luigi Rossi Danielli, an architect from Viterbo.

Around the cloister are a series of Etruscan sarcophagi from 4th to 3rd century BCE coming from tombs in Musarna, Cipollaretta, Norchia and Castel d’Asso.

In the museum are also terracotta sarcophagi from the Etruscan town of Surina and the ancient Sarcophagus of Bella Galiana.

There is also an archeologic collection from Musarna, Ferento, and San Giuliano, and donated in 1912 to his native city by Luigi Rossi Danielli.