Jean Sylvain Bailly
Jean Sylvain Bailly was a French astronomer, mathematician, freemason, and political leader of the early part of the French Revolution. He presided over the Tennis Court Oath, served as the mayor of Paris from 1789 to 1791, and was ultimately guillotined during the Reign of Terror.
Scientific career
Born in Paris, Bailly was the son of Jacques Bailly, an artist and supervisor of the Louvre Palace, and the grandson of, also an artist and court painter. As a child he originally intended to follow in his family's footsteps and pursue a career in the arts. He became deeply attracted to science, however, particularly astronomy, by the influence of Nicolas de Lacaille. An excellent student with a "particularly retentive memory and inexhaustible patience", he calculated an orbit for the next appearance of Halley's Comet, and correctly reduced Lacaille's observations of 515 stars. He participated in the construction of an observatory at the Louvre. These achievements along with others got him elected to the French Academy of Sciences in 1763. In the years prior to the French Revolution, Bailly's distinctive reputation as a French astronomer led to his recognition and admiration by the European scientific community. Due to his popularity amongst the scientific groups, in 1777, Bailly received Benjamin Franklin as a guest in his house in Chaillot.Scientific and other writing
Bailly published his Essay on The Theory of the Satellites of Jupiter in 1766. The essay was an expansion of a presentation he had made to the academy in 1763. He later released the noteworthy dissertation On the Inequalities of Light of the Satellites of Jupiter in 1771. In 1778, he was elected a foreign member of the Royal Swedish Academy of Sciences.Bailly gained a high literary reputation thanks to his Eulogies for King Charles V of France, Lacaille, Molière, Pierre Corneille and Gottfried Leibniz, which were issued in collected form in 1770 and 1790. He was admitted to the Académie française on 26 February 1784 and to the Académie des Inscriptions in 1785. From then on, Bailly devoted himself to the history of science. He published A History of Ancient Astronomy in 1775, followed by A History of Modern Astronomy. Other works include Discourse on the Origin of the Sciences and the Peoples of Asia, Discourse on Plato's 'Atlantide', and A Treatise on Indian and Oriental Astronomy. Though his works were "universally admired" by contemporaries, later commentators have remarked that "their erudition was... marred by speculative extravagances."
During the French Revolution
In a short period of time, Bailly made his way up the judicial ranks. From being the deputy of Paris, he was elected Estates-General on 20 May 1789. Soon after he was elected inaugural president of the National Assembly and led the famous proceedings in the Tennis Court on 20 June, being the first to take the Tennis Court Oath. In the National Assembly Bailly was one of the deputies who secured the passage of a decree that declared Jews to be French citizens on 17 September 1791. He was met with threats and ridicule for this action. This decree repealed the special taxes that had been imposed on the Jews, as well as all the ordinances existing against them.Bailly was a member of the Club de 1789, one of the best-known societies at the time. Though calls on his time from his mayoral duties restricted his involvement in the group, by May 1790, Bailly had risen to presiding officer of the club. In 1791, Jean Sylvain Bailly joined the Jacobin Club, but took no active role in it.
Shortly after the storming of the Bastille on 14 July 1789, he became the first mayor of Paris under the newly adopted system of the Commune.
Image:Le Serment du Jeu de paume.jpg|thumb|right|300px|Sketch by Jacques-Louis David of the Tennis Court Oath. Bailly is pictured in the centre, facing the viewer, his right hand raised.
Mayor of Paris
On 15 July 1789, Bailly took office as the mayor of Paris. Two days later he was met by Louis XVI at the Hôtel de Ville who was there to endorse the Revolution. Bailly presented him with the new symbol of the revolution: the cockade of France.In his function as mayor, he was attacked by Camille Desmoulins and Jean-Paul Marat as too conservative. Bailly continuously sought to promote the authority of the mayor while limiting the power of the General Assembly of the Commune.
Maintaining order
Jean Sylvain Bailly sought to be in full control of his administration as the mayor of Paris. He envisioned being in a position where all answered to him, and only his orders were to be followed. Creating a centralized government within Paris was his plan, however Parisians were not keen with this vision. His views are depicted in the following passage of his Mémoires:"... in the executive assembly, the mayor who presides over it is a specific officer of the commune. This Assembly possesses the totality of power, but its chief is its agent, its executive authority, who should be charged with the execution of its orders and the maintenance of its regulations. Moreover, since he is at the head of the administration, he understands all of its branches and has all of its strings in his hands. He is in a better position to detect the difficulties and the dangers than the other members who do not have the same information. If the law does not demand it, reason dictates that no important step be taken and no important questions be decided in his absence, unless he be allowed at least to make observations..."