Left: Emperor Henry VI (Hadlaub, Codex Manesse, about 1300), original single-headed eagle. Right: Emperor Maximilian with the Imperial Banner (Albrecht Altdorfer, ca. 1515), double-headed eagle with haloes.
The Reichsadler (German pronunciation: [ˈra͜içs|aːdlɐ]; "Imperial Eagle") is the heraldic eagle, derived from the Roman eagle standard, used by the Holy Roman Emperors, later by the Emperors of Austria and in modern coat of arms of Austria and Germany.
The same design has remained in use by the Federal Republic of Germany since 1950, albeit under the name Bundesadler ("Federal Eagle").