Duchy of Saxony

• Ruling Houses
• 

  House of Billunger
  Attributed arms
  961-1106

• 

  House of Supplinburg
  Lothair of Supplinburg
  1106–1137

• 

  House of Welf
  Henry the Proud
  1137-1139

• 

  House of Ascania
  Albert the Bear
  1139–1142

• 

  House of Welf
  Henry the Lion
  1142–1180

• 

  House of Ascania
  1180–1296

• Divisions
• 

  Duchy of Saxe-Lauenburg
  1296–1876

• 

  Duchy of Saxe-Wittenberg
  1296-1806