Who used the double headed eagle on their badges?
Austria-Hungary, also known as the Austro-Hungarian Empire, Dual Monarchy or k.u.k. Monarchy or Dual State, was a dual-monarchic union state in Central Europe from 1867 to 1918, dissolved at the end of World War I. The double headed eagle is a common symbol in heraldry and vexillology. Several Eastern European nations use this symbol today, having adopted this symbol from the Byzantine Empire. In Byzantine heraldry, the heads represent the dual sovereignty of the Emperor (secular and religious) and/or dominance of the Roman Emperors over both East and West. The Russian tsars also adopted the symbol both to position themselves as successors to the Byzantine state and to likewise symbolize their dominion over the west (Europe) and the east (Asia).
