Hôtel de Praslin, Private mansion in 7th arrondissement of Paris, France.

The Hôtel de Praslin at 48 rue de Bourgogne is a private mansion built in 1775 by architect Guillaume Trepsat as the twin of the neighbouring Hôtel d'Anlezy at no. 46, matching it in facade and plan. Its dark blue double door, set in a light stone facade beneath a carved arch, carries a semicircular fanlight and a blue plaque with the number 48. Inside, a service level is reached by a side staircase, leading to an antechamber and two salons, the second a few steps down onto the terrace and garden.

Built in 1775 by architect Guillaume Trepsat for the entrepreneur Jean-Mathias Pasquier, the mansion was erected at the same time as its twin at no. 46, the hôtel d'Anlezy. It takes its name from César Gabriel de Choiseul-Praslin, duc de Praslin, who bought it while it was still under construction. On 11 April 1918 a shell from the German Pariser Kanone hit no. 48. The garden facade and the stair decoration were inscribed as monuments historiques by decree of 10 May 1926.

The mansion reflects how Paris nobility chose to relocate to the Faubourg Saint-Germain neighborhood during the late 18th century, establishing a new center of aristocratic life. Homes like this became symbols of social status and taste among the upper classes of that era.

The mansion is a private residence and cannot be visited inside; the facade, the blue double door with its fanlight and the carved stone arch are seen from rue de Bourgogne. The garden facade and the staircase decoration have been listed as monuments historiques since 10 May 1926. The neighbouring no. 46, the hôtel d'Anlezy, was built at the same time as its twin.

The mansion is the twin of No. 46, the Hôtel d'Anlezy, built at the same time with a matching facade and plan. In 1999 François Pinault bought it for 7 million euros and had restorations led by chief heritage architect Benjamin Mouton, who removed a 1900s roof addition and restored the original joinery colours.