Flags of territories of the Holy Roman Empire

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Principality of Ansbach (date unknown)

Margraviate of Baden (1243-1803)

Bavaria-Landshut (1353-1392)

Bavaria-Munich (1392-1505)

Duchy of Bavaria (1505-1623)

Electorate of Bavaria (1623-1806)

Principality of Bayreuth (date unknown)

Bern (1300s-)

Bohemia (12th century-1993)

Bouillon (date unknown)

Duchy of Brabant (1183-1794)

Margraviate of Brandenburg (circa 1684) (possibly a naval ensign)

Margraviate of Brandenburg (1660-1750)

County of Burgundy (16th century)

County of Burgundy (after Habsburg claim to Burgundy)

Duchy of Burgundy (unknown; under rule of Valois-Burgundy dynasty)

Duchy of Burgundy (date unknown) (military banner)

Burgundian Netherlands (date unknown)

Duchy of Carinthia (?-1946)

Carniola (date unknown)

Dauphiné (date unknown)