Palaces and Parks of Potsdam and Berlin refers to a group of palace complexes and landscaped gardens found in Potsdam, and the German capital of Berlin. The term was used upon the designation of the cultural ensemble as a World Heritage Site by UNESCO in 1990. It was recognized for the historic unity of its landscape—a unique example of landscape design against the background of monarchic ideas of the Prussian state and common efforts of emancipation. Initially, the site encompassed 500 hectares, covering 150 construction projects, which spanned the years from 1730 to 1916. Two stages of extension to the World Heritage Site, in 1992 and 1999 led to the incorporation of a larger area to the patrimony.