Maximilien RobespierreJordan, David P. (2013). The Revolutionary Career of Maximilien Robespierre. New York: Simon and Schuster. ISBN9781476725710. Retrieved 17 February 2019. [Robespierre] was always more comfortable at the Jacobin Club than standing before the National Assembly. Not only had the Jacobins been formed in his own image, but he was assured of a sympathetic hearing before his friends. Robespierre had been a member of the Jacobins from its earliest Versailles days when it began inconspicuously as a gathering of deputies from the province of Brittany, along with some other interested adherents [...]. The group did not acquire its famous nickname, the Jacobins, until it rented an abandoned Dominican monastery, in the rue Saint-Honoré in Paris, whose monks had been known as Jacobins and whose building also shared the name.
The Jacobins were a group of radicalists who supported The French Revolution.
Their leader was Maximilien de Robespierre, and they were in power of the French government from June of 1793 to July of 1794.
Initially founded in 1789 by anti-royalist deputies from Brittany, the club grew into a nationwide republican movement, with a membership estimated at a half million or more.