Comment by BrandoElFollito

Ahhh, thank you for the tip. I live in Versailles and usually go to museums for art, but this would be wonderful as well.

The Musée de Sèvres (or Bureau des Mesures as it is called now) has the original kilogramme and meter iridium reference, hidden in the basement ;( So if the director has a change of heart, I am all in!