With 500 ha of parks and 150 build­ings con­struct­ed between 1730 and 1916, Potsdam‘s com­plex of palaces and parks forms an artis­tic whole, whose eclec­tic nature rein­forces its sense of unique­ness. It extends into the dis­trict of Berlin-Zehlen­­dorf, with the palaces and parks lin­ing the banks of the Riv­er Hav­el and Lake Glienicke. Voltaire stayed at the Sans-Souci Palace, built under Fred­er­ick II between 1745 and 1747.