The area of Chaalis is a destination of choice for lovers of heritage, art and history. From this former royal abbey founded in the twelfth century still remain the ruins of the Gothic church and cloister, the chapel and its exceptional decoration of Renaissance frescoes and the imposing convent building of the eighteenth century. Sold during the Revolution, then restored by several owners in the 19th century, the estate became, in 1902, the property of Nélie Jacquemart-André, who collected a collection of nearly 6,000 works of art. Upon her death in 1912, she bequeathed Chaalis and her Parisian hotel to the Institut de France, which has since worked to preserve and restore this exceptional heritage. A museum dedicated to Jean-Jacques Rousseau and a rose garden, classified «Remarkable Garden», complete this ensemble.