The collection includes publications collected by the mathematician Aleksander Czajewicz (1843-1926). Among them there are mainly documents publish in the first half of the 19th century. The oldest book in digital collections of the Institute of Mathematics of the Polish Academy of Sciences, published in Latin in 1790, is also assigned to this collection. A characteristic feature of these documents is the stamp "Library of A. Czajewicz", which can always be found on the title page of each of the objects. Some publication also bear a handwritten signature of the owner of the collection.