At the entrance of the palace, in the middle of a courtyard, stands a large equestrian statue of the Great Elector. It was designed in 1698 by Andreas Schlüter and commissioned by King Frederick I, the elector's son. At the base of the statue are four chained warriors, symbolizing the four temperaments (which stem from the antiquity where they were used to describe personalities). The statue was originally located on the Kurfürstenbrücke, a bridge near the Stadtschloss (city palace) on Museum Island, but during the Second World War the statue was submerged to the bottom of the Tegeler See, a large lake in Berlin. The statue was recovered in 1952 and after a restoration it was moved here, in front of Charlottenburg Palace.