![Jean Sylvain Bailly (1736 – 1793) French astronomer, mathematician, freemason, political leader of the early part of the French Revolution. He presided over the Tennis Court Oath, served as the mayor of Jean Sylvain Bailly (1736 – 1793) French astronomer, mathematician, freemason, political leader of the early part of the French Revolution. He presided over the Tennis Court Oath, served as the mayor of](https://c8.alamy.com/comp/RJH52M/jean-sylvain-bailly-1736-1793-french-astronomer-mathematician-freemason-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-RJH52M.jpg)
Jean Sylvain Bailly (1736 – 1793) French astronomer, mathematician, freemason, political leader of the early part of the French Revolution. He presided over the Tennis Court Oath, served as the mayor of
![File:Anonymous - Portrait de Jean-Sylvain Bailly (1736-1793), maire de Paris. - P1463 - Musée Carnavalet.jpg - Wikimedia Commons File:Anonymous - Portrait de Jean-Sylvain Bailly (1736-1793), maire de Paris. - P1463 - Musée Carnavalet.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Anonymous_-_Portrait_de_Jean-Sylvain_Bailly_%281736-1793%29%2C_maire_de_Paris._-_P1463_-_Mus%C3%A9e_Carnavalet.jpg/1200px-Anonymous_-_Portrait_de_Jean-Sylvain_Bailly_%281736-1793%29%2C_maire_de_Paris._-_P1463_-_Mus%C3%A9e_Carnavalet.jpg)
File:Anonymous - Portrait de Jean-Sylvain Bailly (1736-1793), maire de Paris. - P1463 - Musée Carnavalet.jpg - Wikimedia Commons
![Revolution francaise : "Jean Sylvain Bailly (1736-1793) tremblant de froid amene a la guillotine en novembre 1793" (French revolution : Jean-Sylvain B Stock Photo - Alamy Revolution francaise : "Jean Sylvain Bailly (1736-1793) tremblant de froid amene a la guillotine en novembre 1793" (French revolution : Jean-Sylvain B Stock Photo - Alamy](https://c8.alamy.com/comp/2BE2P8E/revolution-francaise-jean-sylvain-bailly-1736-1793-tremblant-de-froid-amene-a-la-guillotine-en-novembre-1793-french-revolution-jean-sylvain-b-2BE2P8E.jpg)