La Haye des Fosses, he founded the Olympic Lodge in 1782, the main object of which was the organization of concerts intended to replace the Concert des Amateurs dissolved in 1781 following the bankruptcy of one of its supporters, the tax ferme générale Pierre Haudry de Soucy. The concert des Amateurs used to take place in the salons of the Hôtel de Soubise and was founded by their respective fathers, the Baron d'Ogny and Marin de La Haye des Fosses in 1769. The concerts of the Olympic Lodge were managed by the Olympic Society, the commercial entity of the Lodge, which installed a club for its subscribers in 1785 at the Palais Royal, known as the Sallon Olympique. On the first floor were the rooms of the lodge itself. The Olympic Society inherited the considerable musical background of the Concert des Amateurs which it continued to enrich thanks to the numerous and high contributions of its members. The most famous acquisition was that of the six Paris symphonies (82 to 87) and symphonies 90-92 commissioned to Joseph Haydn through Comte d'Ogny and the Chevalier de Saint-Georges. The concerts took place in the Social Contract Room (attached to the Saint John of Scotland Lodge and the Social Contract), in the Hôtel de Bullion, rue Coq-Héron, until 1786. Then they took their seats in the Hall of the Hundred Swiss of the Tuileries Palace, liberated by the Concert Spirituel which had emigrated to the Salle des Machines in 1784, itself abandoned by the French Comedians who settled in 1782 in the Théâtre Français (which became in 1797 the Théâtre de l'Odéon). After 5 and 6 October 1789, when the Court was installed at the Tuileries Palace, the "Salle des Cents-Suisses" returned to its original destination as "Salle des Gardes" and the Olympic Society ended its concerts. It was probably at this period, that the Comte d'Ogny donated his musical background to the Olympic Society. This considerable library represented the last twenty years of the musical life of the Ancien regime when it was most innovative. The works were premiered at the Concert des Amateurs, followed by those of the Olympic Society, when they followed, before being included among others by the Concert Spirituel. On the death of the Comte d'Ogny, the collection was subject of a public sale which lasted at least four days, from 7 to 10 February 1791. One can