The morning of the 14th July 1789 saw the beginning of the French Revolution when Parisian revolutionaries stormed the Bastille, a large fortress, prison and ammunition store that symbolised everything that was wrong with the monarchy.

King Louis XVI of France and his family were caught attempting to escape Paris during the Flight to Varennes.

On the 20th June 1789 at Versailles in France, the National Assembly swore the Tennis Court Oath in which they vowed not to separate until a written constitution had been established for the country.

On the 7th May 1794, just a few weeks before the Law of 22nd Prairial that created the Great Terror, Maximilien Robespierre formally announced the creation of the Cult of the Supreme Being in a meeting of the National Convention.

It is estimated that up to a quarter of a million different units of measurement were in use throughout France at eve of the Revolution in 1789, and that these differed not only from trade to trade but also from town to town.