The organ was built by Francois-Henri Clicquot for the Sainte-Chapelle, using the case of Lavergne, designed by Pierre-Noël Rousset (1757). It was transferred to Saint-Germain-de-l’Auxerrois in 1791 and parts of at least two other instruments were incorporated in the newly assembled organ at that time. In the 19th century, the diapasons were modified by Dallery, Ducroquet (under the influence of Boëly) and Merklin, but its classical grand jeu survived. Indeed, most reeds date from before the revolution, although the cromorne of the positive was added some 30 years ago (replacing a historic reed). At that time, a new tierce was added too (replacing the Salicional 4 of Ducroquet). In the period 1995-2005 the organ was completely out of order, but in 2005-2008 works were carried out to make the organ playable again, without any change in the historic materials . A study by Christian Lutz should form the basis for choosing a strategy for a thorough restauration of this unique instrument. 21 out of the 33 stops date from before the revolution.