The Museo del Seminario Conciliar, opened on September 1998, consists of a Marian Room, Ecclesiastical Collection, Gallery and Archive and the Archaeological Collection.
The Marian Room has a replica of Our Lady of Peñafrancia, pictures of the original Lady of Peña de Francia in Salamanca, Spain and extant postcard-size pictures of the canonical coronation of Our Lady of Peñafrancia.
The Ecclesiastical Collection displays retablos (altar backdrops), antique santos, vestments, chalices, monstrances and episcopal seals of the liberal-minded Bishop Francisco Gainza and hard-line Bishop Arsenio Campo, the last Spanish bishop to serve in Bicol.
The Archives-Gallery contains the memorabilia of Monsignor Jorge Barlin as well as pictures of the various Bicol bishops including Jose Cardinal Sanchez, the first Bicolano cardinal. The Archive has books in Latin and Spanish printed in the 1600s, 1700s and 1800s as well as baptismal and marriage registries in the 1700s and early 1800s.
The Archaeological section displays the collection of Ermelo M. Almeda. It consists of Philippine pottery and burial jars found in archaeological diggings in the Bicol region, Calatagan (Batangas), Marikina City (Metro Manila), Samar and Palawan; porcelain ware from Vietnam and Thailand and Chinese porcelain ware from the Tang Dynasty (618 to 906 AD) to the Qing Dynasty (1645 to 1912).
Museo del Seminario Conciliar: Holy Rosary Minor Seminary, Naga City, Camarines Sur.