EN
The article presents the history and content of the so-called Collectio Autographorum that was created from part of the manuscripts of the Imperial Public Library in the 1840s. They entered its constituent entities from different provenances, fragments of manuscripts from the collections of the Zaluski Library, a substantial part from the collection of Peter Dubrowski, and from other collections of the IPL gathered in the first period of its existence. In the 1920s, a large part of the Collectio Autographorum was returned to the re-established Polish State and furnished the National Library in Warsaw. Most of this portion was burnt in 1944.