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History
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Woodcut dated 1800 illustrating the new decimal units which became the legal norm across all France on 4 November 1800
Woodcut dated 1800 illustrating the new decimal units which became the legal norm across all France on 4 November 1800
Historical international prototype of the metre, made of an alloy of platinum and iridium, that was the standard from 1889 to 1960.
Historical international prototype of the metre, made of an alloy of platinum and iridium, that was the standard from 1889 to 1960.
The Pavillon de Breteuil in Saint-Cloud, Paris
The Pavillon de Breteuil in Saint-Cloud, Paris
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Pavillon de Breteuil in Saint-Cloud, France
Pavillon de Breteuil in Saint-Cloud, France