The Incunabula Short-Title Catalogue (ISTC) is an international database of fifteenth-century printing which has been in development at the British Library since 1980. As well as the British Library, major contributors to ISTC include the Bayerische Staatsbibliothek, Munich; the Biblioteca Nazionale Centrale, Rome; the Bibliographical Society of America, the Koninklijke Bibliotheek, The Hague; and the Bibliothèque Royal Albert Ier, Brussels.
No autograph document of Dante's has survived. Not only is there no original manuscript of the Divine Comedy, but nothing remains of his works in Latin or the vulgate, no letters, not even a signature by which he can be identified. But making up for his lack is the fact that his masterwork was very widely distributed; just a few years after his death, copies multiplied all over Italy.