The Marchesi Bourbon di Sorbello, erudite bibliophiles of their time, passionately devoted themselves to building their library collection by acquiring rare manuscripts and valuable printed works, among which are important volumes like Spaera Mundi (treatise on astronomy dating to 1478); the 1770 edition of the Encyclopedie Française by Diderot and D’Alembert; and the Tragedies by Vittorio Alfieri, donated by the great dramatist to his friend Diomede Bourbon di Sorbello. There is also a vast selection of travel books from the 17th to the 19th Century, a vast collection of 18th Century literature and history books in French, including valuable and rare editions.