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Were the costs of arms for the Dukes of Normandy and the Duke of Guyennes inspired by the English coat of arms? - Quora

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Escutcheon (heraldry) - Wikipedia

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Were the costs of arms for the Dukes of Normandy and the Duke of Guyennes inspired by the English coat of arms? - Quora

Category:SVG coat of arms elements - escutcheon shapes - Wikimedia Commons