The great organ of the church of La Varenne was installed on the gallery shortly before the Second World War. II/P originally, it came from the Père Lachaise Columbarium. The House of Gloton raised it to III/P and equipped it with a new console. The transmission is then electric, allowing extensions. The pipework, of uneven quality, has been the subject of several redesigns, notably Barbéris (1987), adds the Montre, reharmonizes the PJ, the Prestant and the Gambe; Swiderski (1995) added the Flûte au Positif, and he was in charge of routine maintenance until 2003 when he sounded the alarm. The restoration was entrusted to Bernard Dargassies between September 2005 and April 2006. The old action is replaced by electronics, he raises the GO windchest by one meter so that it speaks at the level of the façade. The organ contains 15 duplicate series on 32 stops. Source

Like the church of Saint-François-de-Sales, the church of Saint-Hilaire is linked to the history of its district, that of La Varenne, which was, until 1791, a commune separate from that of Saint-Maur. When the two communes were united, the church of La Varenne was destroyed in favour of that of Saint-Maur-des-Fossés. It was Henri-Pierre Caffin who built a housing estate in 1832 on part of the land of La Varenne that he had acquired, then financed the construction of a new church in 1865. It became a parish church in 1907 and was completely rebuilt in 1929. It is one of the three starting points of the pilgrimage of Our Lady of Miracles. Source