The new system tied length and mass to natural standards (the metre was originally one-forty-millionth of the Paris meridian, while the kilogram is the mass of a cubic decimetre of water), and it ...

Ritz Paris Le Comptoir is François Perret's signature patisserie-tea room, now on rue Cambon and rue de Sèvres. Two Parisian addresses for a sweet, chic and generous interlude, between elongated ...

In 1786, the watchmaker and mathematician known as Monsieur Rousseau installed a small bronze cannon in front of his shop, on the Paris meridian, topped with a magnifying glass. From May to October, ...