Maximilian I may refer to: Maximilian I, Holy Roman Emperor, reigned 1486/93–1519 Maximilian I, Elector of Bavaria, reigned 1597–1651 Maximilian I, Prince of Hohenzollern-Sigmaringen (1636-1689) Maximilian I Joseph of Bavaria, reigned 1795–1805 (Elector of Bavaria) and 1806–1825 (King of Bavaria) Maximilian I of Mexico, reigned 1864–1867