The Biblioteca degli Uffizi acts as a documentary ‘black box’ for all the notable collecting that has taken place in Florence during the past 500 years. The Library’s collections stretch from the autograph 22-year diary of the 15th-century painter Neri di Bicci and the different editions of Vasari’s Lives of the painters, through the inventories and lists of objects acquired and held successively by the Medici, the House of Hapsburg-Lorraine and the new Italian united kingdom, and to all the memoirs and plans and catalogues of the directors and ‘royal antiquarians’ of the Uffizi Gallery. In addition it contains major works on art history, artists, public and private art collections, exhibitions and many related topics. The Library holds 77,000 printed books and more than 440 manuscripts; its catalogue is shared with the IRIS consortium of art history and humanities libraries and contributes to artlibraries.net through this shared bibliographic database. Several digitisation projects have already been completed or are currently in progress.