It was during a survey carried out before the building was transformed into a Maison de la Musique et de la Danse in the spring of 2004 that the painted beams of the Maison dite de Richelieu appeared. Under the plaster was found a "French" ceiling dating from the first decades of the 17th century, when the house was built. This exceptional discovery in the vicinity of Paris led to the classification of the joists, but also of the roof and the facades. This house, baptized in the Chronicles of the eighteenth century, "House of Oblivion", would have been built thanks to the Cardinal of Richelieu, who would have used it for "low works"...