<page_title> List of monarchs of Prussia </page_title> <section_title> Kingdom of Prussia (1701–1918) </section_title> <table> <cell> William I <col_header> Name </col_header> </cell> <cell> 22 March 1797 – 9 March 1888 (aged 90) <col_header> Lifespan </col_header> </cell> <cell> 2 January 1861 <col_header> Reign start </col_header> </cell> <cell> 9 March 1888 <col_header> Reign end </col_header> </cell> <cell> Brother of Frederick William IV; also President of the North German Confederation (1867-1871) and German Emperor (from 1871) <col_header> Notes </col_header> </cell> <cell> Hohenzollern <col_header> Family </col_header> </cell> </table>
William I, of the House of Hohenzollern, was the King of Prussia from 2 January 1861 and the German Emperor from 1871 to his death.