The Diocesan Museum of Lamezia Terme has exhibits of sacred objects from the towns in the diocese of Nicastro and from the former diocese of Martirano, which was abolished in 1818 and joined to that of Nicastro by the Concordat of 1818. The oldest object preserved in the museum is a 12th century ivory jewelry box from the Arab-Sicilian collection. Worthy of mention, among the more significant items from an historic and artistic viewpoint, are reliquaries of the arm bones of San Giovanni Battista and Santo Stefano Protomartire, linked to the secular history of the Knights of Malta and to the Bailiwick of S. Eufemia, dated to the 15th century and of southern origin.

A Monstrance (Filippo Aiello, 1824-1834)

Other precious objects are: a mother-of-pearl money-box from the 1600s; a 1655 staff of Bishop Perrone, and two crosses on staffs from the 1700s; a sculpture from the 1400s of the Madonna delle Grazie by Domenici Gagini; wooden statues of the annunciation, and a bust of S. Martin from the 16th century; a great painting on a panel of the Madonna between St. Luke and St. Stephen, called the Pala of the Veterana; a canvas of St. Francis of Assisi attributed to Mattia Preti, and another canvas of the Assumption, of the Maratta school. Of great significance are paintings by the Nicastrese painter Francesco Colelli which encompasses a period of 20 years from 1762 to 1782.

Saint Frances (Mattia Preti, 17th century)

There are also: two missals with silver encrusted ornamentation (one of Monsignor Tarsia, Bishop of Martirano in the 1700s, and one of Monsignor Barbieri, Bishop of Nicastro in the 1800s), a mitre; a cope with the insignia of Monsignor Berlingieri; four portraits of bishops who ruled the cathedral of Nicastro from the first half of the 1700s to the second half of the 1800s; and an array of silver liturgical pieces from the 1700s to the early 1900s, with pieces noteworthy for their excellence such as the works of such notable Neapolitan silversmiths as Mattia Condursi, Filippo Ajello and Gennaro Pane. One work of great iconographic value is the canvas of S. Vincenzo and the City, which portrays the city of Nicastro in 1854. A whole section of the museum displays liturgical vestments of the 1700s and 1800s, and busts of Saints Peter and Paul from the early 1900s, after whom the Lamezian cathedral is named.