On January 1 , 2005 , Lower Saxony disbanded its four Regierungsbezirke : Braunschweig , Hanover , LÃ 1\/4 neburg , and Weser-Ems . On January 1 , 2005 , Lower Saxony disbanded its remaining four Regierungsbezirke : Braunschweig , Hanover , LÃ 1\/4 neburg , and Weser-Ems .