A long, narrow flag or banner, especially one carried on a lance or displayed on a building; also a ribbon or scroll bearing an inscription or heraldic device.
From Middle French banderole, diminutive of bandera (flag/banner), from Frankish *banda. The -ol/-ole endings are variant diminutive forms.
Medieval knights would carry banderols as identification—it was basically their military ID badge, showing which lord they served and their heraldic symbols all in one colorful flag!
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