The Kingdom of Prussia (German: Königreich Preußen) was a German kingdom that constituted the state of Prussia between 1701 and 1918.[3] It was the driving force behind the unification of Germany in 1871 and was the leading state of the German Empire until its dissolution in 1918.[3] Although it took its name from the region called Prussia, it was based in the Margraviate of Brandenburg, where its capital was Berlin. Prussia is considered the legal predecessor of the unified German Reich (1871–1945) and as such a direct ancestor of today's Federal Republic of Germany.[3] The formal abolition of Prussia, carried out on 25 February 1947 by the fiat of the Allied Control Council referred to an alleged tradition of the kingdom as a bearer of militarism and reaction, and made way for the current setup of the German states. However, the Free State of Prussia (Freistaat Preußen), which followed the abolition of the Kingdom of Prussia in the aftermath of World War I, was a major democratic force in Weimar Germany until the nationalist coup of 1932 known as the Preußenschlag.[citation needed] The Kingdom left a significant cultural legacy, today notably promoted by the Prussian Cultural Heritage Foundation (Stiftung Preußischer Kulturbesitz (SPK)), which has become one of the largest cultural organisations in the world