The Bonaventure library is a unique, highly specialized collection of rare research tools, covering early Christian and Medieval history and theology. It includes over 4,000 volumes.
Examples of titles in the Bonaventure Collection include the monumental series of Migne, Patrologia Latina et Graeca, as complete a collection as possible of the writings of the Greeks and Latin Fathers-some 220 volumes for the Latin and 180 volumes for the Greeks. To supplement this series there is the more recent Corpus Christianorum which provides the best critical texts available of the Latin Fathers. The Corpus Christianorum is an on-going project of the Belgian Benedictines. Add to these the rare and valuable Pauly-Wissowa collection of 60 volumes.
There are also 13 highly specialized encyclopedia series on the lore of the ancient world and early Christian theology. Some highlights include the Cabriol-LeClercq Dictionnaire d'Archeologie Chretienne in 15 volumes; also the Dictionnaire de Spiritualite and the Dictionnaire de Theologie Catholique, and the Acta Conciliorum Oecumenicorum.
Of special interest is an excellent nucleus of Franciscan studies and journals. For instance, the monumental works of St. Bonaventure, Alexander of Hales, Duns Scotus, Wadding's Annals and Scriptores.