The State Archives of Viterbo, in addition to the documentation of the pre-unitary state since the Middle Ages, preserves the notarial archives prior to the last century and the archives of the religious corporations that were suppressed and had property confiscated by the state. In these documents is all the court and administrative documents that have been closed for more than forty years, and some private archives of households or businesses, in particular those with local roots.
The Diocesan Center for the Documentation of Religious History and Culture (the Cedido), located near the Papal Palace, it houses many historical archives and ecclesiastical libraries. Specifically it is comprised of The Historic Diocesan Archive of Viterbo, the Archive and Library of the Chapter of the Cathedral, the Library of the Interdiocesan of Viterbo and Tuscania, the Archive and Library of the Viterbo branch of Italian Catholic Action, the archives of several parishes, monasteries, and convents of the Diocese.
To know the birth of the Consortium Library of Viterbo, we must go back in time, exactly in February 1973, when with the aim of bringing together the two pre-existing city libraries – the provincial “Anselmo Anselmi” and the municipal “Ardenti” merged under a single entity but with separate offices as we still find them divided today. After a temporary dissolution of the Consortium in 1994, the institution resumed its activity as the Viterbo Consortium Library in 1996.