 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 world heritage encompassed 500 hectares, covering 150 construction projects, which spanned the years from 1730 to 1916.Until the Peaceful Revolution of 1989, these areas were separated by the Berlin Wall, running between Potsdam and West Berlin, and several historic sites were destructed by 'death strip' border fortifications.