Świebodzin is a town in western Poland with 21,736 inhabitants (2019). It is the capital of Świebodzin County. Since the Local Government Reorganization Act of 1998, Świebodzin has been part of Lubusz Voivodeship. It was formerly part of the Zielona Góra Voivodeship (1975–1998).

Brandenburg-Prussia is the historiographic denomination for the early modern realm of the Brandenburgian Hohenzollerns between 1618 and 1701. Based in the Electorate of Brandenburg, the main branch of the Hohenzollern intermarried with the branch ruling the Duchy of Prussia, and secured succession upon the latter's extinction in the male line in 1618. Another consequence of intermarriage was the incorporation of the lower Rhenish principalities of Cleves, Mark and Ravensberg after the Treaty of Xanten in 1614.