The Vatican Library possesses over a million printed books, predominantly old and rare books, including around 8,400 incunabula; a large number of fifteenth-century books (which are included in EDIT16, the ICCU's census of Italian sixteenth-century books); sixteenth-century books (particularly in the Barberini and Chigi collections), as well as seventeenth- and eighteenth-century books. The Library preserves two types of collections of printed books: “closed collections” and “open collections”.
