 The second son of King Ludwig I of Bavaria , Otto ascended the newly created throne of Greece while still a minor . His government was initially run by a three @-@ man regency council made up of Bavarian court officials . Upon reaching his majority , Otto removed the regents when they proved unpopular with the people and he ruled as an absolute monarch . Eventually his subjects ' demands for a Constitution proved overwhelming , and in the face of an armed but peaceful insurrection Otto in 1843 granted a constitution . However he rigged elections using fraud and terror . 
