Polona is a Polish digital library, which provides digitized books, magazines, graphics, maps, music, fliers and manuscripts from collections of the National Library of Poland and co-operating institutions.

The casket with the ashes of ancient prints and manuscripts burned by Germans after the fall of the Warsaw Uprising in 1944 was cataloged as the 2 millionth object.

Polona/2milions introduces several functionalities such as advanced search, press panel or private collections.

From January 2017, Polona resources are increased thanks to the implementation of the project "Patrimonium – the digitalization and release of Polish national heritage from the collections of the National and Jagiellonian libraries".

Polona presents not only the collections of the National Library of Poland, but also the collections of the Fryderyk Chopin National Institute, Czartoryski Library, the State Ethnographic Museum in Warsaw and others.