The Library, restored and reopened to the visitors in 2014, houses an extraordinary collection of books. More than 400,000 volumes among which 15,000 incunabula and more than 1,300 manuscripts. The incunabula section is one of the most significant and rich in Italy. To be more precise, it is composed of 1,265 volumes, for a total of 1,083 different editions. Twenty-four titles are the only copies in Italy, among which five are the only copies in the whole world. There are also illuminated copies and prestigious woodcut editions.