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Institution

BIPM

A grand, illuminated building with the acronym "BIPM" prominently displayed on its facade stands under a dark sky, showcasing classical architectural details and warm interior lighting.

The Bureau International des Poids et Mesures, the international metrology bureau established by the Metre Convention of 1875. Headquartered at the Pavillon de Breteuil in Sèvres, a Parisian suburb, on land that is legally international territory. Custodian of the former International Prototype of the Kilogram and coordinator of the world's atomic clocks via the calculation of Coordinated Universal Time.

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