La Loge des Neuf Soeurs (French pronunciation: [la l de noef soe?]; The Nine Sisters), established in Paris in 1776, was a prominent French Masonic Lodge of the Grand Orient de France that was influential in organising French support for the American Revolution. A "Société des Neuf Soeurs," a charitable society that surveyed academic curricula, had been active at the Académie Royale des Sciences since 1769. Its name referred to the nine Muses, the daughters of Mnemosyne/Memory, patrons of the arts and sciences since antiquity, and long significant in French cultural circles. The Lodge of similar name and purpose was opened in 1776, by Jérôme de Lalande. From the start of the French Revolution in 1789 until 1792, "Les Neuf Soeurs" became a "Société Nationale".
During the French Revolution, while the Académie Royale des Sciences et des Arts was drastically reorganised, two members of the lodge, Antoine Laurent de Jussieu and Gilbert Romme, in collaboration with Henri Grégoire, helped to organise a "Société Libre des Sciences, Belles Lettres et Arts", to subsidise what had become the Institut de France so as to keep the original influence of the "Neuf Soeurs" intact. (Hahn, 1971) The lodge was reconstituted under its original name in 1805, ceased operation from 1829-1836, and finally closed in 1848. Its former location is thought to be on the Rue de la Bûcherie on the Left Bank across from Notre-Dame.
Its successive "Venerable Masters" of the first decade were Benjamin Franklin (1779-1781), Marquis de La Salle (1781-1783), Milly (1783-1784), Charles Dupaty (1784), Elie de Beaumont (1784-1785), and Claude Pastoret (1788-1789) (Ligou, 1987).
In 1778, the year Voltaire became a member, Benjamin Franklin and John Paul Jones also were accepted along with Jean Sylvain Bailly. Benjamin Franklin became Master of the Lodge in 1779, and was re-elected in 1780. When Franklin, after a long and influential stay in Europe, returned to America to participate in the writing of the Constitution, Thomas Jefferson a non-Mason took over as American Envoy.
Jean-Antoine Houdon, a member of "Les Neuf Soeurs", added Jefferson's marble bust to his corpus of works, which included busts of Franklin and General Lafayette. Jefferson persuaded Houdon to make his famous statue of George Washington, for which Houdon travelled to America in 1785.
While Jefferson stayed in Paris, at the Maison des Feuillants, his neighbour was Jean-François Marmontel "Secretary-for-Life" of the Paris Academy of Sciences and another member of the Lodge. At the same time Jefferson's friend John Adams was neighbour, at Auteuil, of Anne-Catherine de Ligniville, Madame Helvétius (see also Anne-Catherine de Ligniville Helvétius) who hosted the famous Cercle d'Auteuil, where the influence of "Les Neuf Soeurs" was at its highest.
In Mémoires pour servir à l'histoire du Jacobinisme (4 vol.,1797-1798) Abbé Barruel attributed membership to key figures of the French Revolution like Brissot (Barruel claims Brissot a member of Neuf Soeurs, although Brissot writes that he was initiated into a German Lodge but was never active) and Danton.