in archaeology, prehistory, ancient history and medieval history, with a special reference to Asturias. Its catalogue is integrated in the Collective Catalogue of the Network of Libraries of Asturias and its query can be done through the Collective Catalogue of the Libraries of Asturias. The bibliographic collection possesses a great chronological amplitude, that goes from 1650 to actuality. The documentary typology is varied and although the weight is made by monographs and magazines, it also has cartographic material, images, audiovisual supports, drawings, plates, pictures, posters and manuscripts. The main linguistic coverage is the Spanish but it also has English, French and Italian publications. It is formed by 15.000 volumes. The bibliographic collection is grouped in several sections individualized by its thematic, typology or origin. HISTORICAL FUND or LIBRARY of the CPMHA. It constitutes an own section, and it is known as the Library of the Commission. It is formed by near 3.500 registers, gathered from 1844 to 1952 which answer to the interests of the institution, in a determinate period and by those who were at the top of the shopping and acquisitions (Ciriaco Miguel Vigil, Fermín Canella, Fortunato de Selgas, Rafael Altamira, etc.). It predominates the following matters: epigraphy, numismatist, antiquities, classical archaeology, history of art, medals, ivories, fine arts, Asturian subjects, etc. The majority were printed between 1870 and 1930 and the origin is diverse. it entered by purchase, by donation of its author or possessor and by exchange between history institutions, local studies or of provincial museums. There are French editions of art encyclopedias, of classical art, antiquities, editions on the first archaeologic excavations in the 19th century, and the main works of the 19th century in matter of prehistory and archaeology. It conserves an extraordinary work: Architectural Monuments of Spain, considered the most ambitious project from the bibliographic point of view of ones tackled in Spain. This work was printed to study and spread the artistical heritage of the country, specially the Asturian. It was published under the direction of a special commission created by the Ministerio de Fomento, between 1856 and 1881. In its graphic part it was employed with big precision the technics of the intaglio, the lithography and the cromolitografía. Also it stands out factitious editions that gather documents and varied brochures, grouped by subjects of interest: Subjects of Asturias, political Writings, History, etc. There are documents of interest written in Asturian language,