The Załuski Library established in Warsaw in 1747 by Józef Andrzej Załuski and his brother, Andrzej Stanisław Załuski, both Roman Catholic bishops, was a public library nationalized and renamed upon its founders' death into the Załuski Library of the Republic which existed until the final demise of Polish-Lithuanian Commonwealth in the Third Partition of Poland in 1795.

Warsaw, officially the Capital City of Warsaw, is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland. Its population is officially estimated at 1.86 million residents within a greater metropolitan area of 3.27 million residents, which makes Warsaw the 7th most-populous city in the European Union. The city area measures 517 km2 (200 sq mi) and comprises 18 districts, while the metropolitan area covers 6,100 km2 (2,355 sq mi). Warsaw is an alpha global city, a major cultural, political and economic hub, and the country's seat of government. It is also capital of the Masovian Voivodeship.