On 30 September 1717, Christian-Louis de Montmorency Luxembourg, Prince of Tigny and Marshal of France, purchased, for the sum of 91 Livres, 2869 toises (30,000 m²) of land along the Rue de Varenne. He was a lover of gardens and intended to create a country park. In 1722, he commissioned a little-known architect, Jean Courtonne, to conceive and construct a mansion. His success in this endeavour won him entry to the Academy of Architecture, where he wrote a much-remarked "Treatise on Perspectives" (1725). But the expense of the enterprise forced the Prince of Tigny to sell, and it was Jacques Goyon, Count of Matignon who bought the Hôtel, completed in 1725, as a present for his son, the Duke of Valentinois.