Frederick William IV, King of Prussia, died in Potsdam at the age of sixty-five. He had reigned since 1840 but from January, 1858 his government had largely been in the hands of his brother William, acting as Regent, after a stroke in 1857 had left him paralyzed and mentally impaired. On Frederick's death, William became King William I. Frederick William was buried in the Charlottenburg Palace in Berlin, traditional place of Prussian kings. (By John Osborne)