Portrait of Jean-Sylvain Bailly is a 1790 painting by French Neoclassical artist Jacques Louis David. This work is located in the Musée Carnavalet in Paris, France.
Jean-Sylvain Bailly (1736-1793) was a prominent French astronomer, mathematician, and politician, notably serving as the first mayor of Paris during the French Revolution. Born in Paris to an artistic family, Bailly initially pursued a career in the arts before turning his attention to science, particularly astronomy.
As an astronomer, Bailly made significant contributions to the field, including the calculation of the orbits of comets and the mapping of the moons of Jupiter. His work earned him membership in the French Academy of Sciences in 1763. He also wrote extensively on the history of astronomy, tracing its development from ancient civilizations to his contemporary period, and was elected to the Académie Française in 1783.
Bailly’s political career began with the outbreak of the French Revolution in 1789. Elected as a deputy to the Estates-General, he played a pivotal role in the early stages of the revolution. On June 17, 1789, Bailly was elected president of the newly formed National Assembly, where he presided over the famous Tennis Court Oath, a defining moment in the revolution where delegates vowed not to disband until a new constitution was established.
In July 1789, following the storming of the Bastille, Bailly was elected as the first mayor of Paris. As mayor, he faced numerous challenges, including food shortages, economic instability, and rising political tensions. Bailly worked to maintain order and support the revolutionary cause but struggled with the increasingly radical and volatile political environment.
Bailly’s tenure as mayor ended in 1791, and he gradually withdrew from active politics. However, during the Reign of Terror, he was arrested by the revolutionary authorities. His association with the moderate Girondins and his actions during the Champ de Mars Massacre, where he ordered the National Guard to disperse a crowd demanding the abolition of the monarchy, made him a target for the radical Jacobins.
On November 12, 1793, Jean-Sylvain Bailly was executed by guillotine. Despite his tragic end, Bailly’s contributions to science and his role in the early stages of the French Revolution remain significant. He is remembered as a key figure who bridged the worlds of science and politics during one of France’s most transformative periods.