Hôtel de Chaulnes, Private mansion in Place des Vosges, Paris, France.

The Hôtel de Chaulnes stands at 9 place des Vosges, on the square's west side between the hôtels de Sully and Pierrard. Its facade alternates bands of red brick and light stone: three round arches recessed at ground level, five bays of tall stone-framed windows with black wrought-iron balconies, a dentilled stone cornice and a steep dark slate roof with dormers and brick chimneys. A vaulted gallery runs beneath.

In the early 17th century the house belonged to Pierre Fougeu, sieur Descures, and Louis XIII stayed there during the festivities for the inauguration of the Place Royale. Sold in 1644 to Honoré d'Albert d'Ailly, first duke of Chaulnes, it passed to his son Charles, third duke, who had the right wing in the courtyard built by Jules Hardouin-Mansart. Bought in 1701 by Jean Aymar de Nicolaÿ, marquis de Goussainville, it stayed with his descendants until 1822, when the Moreau family acquired it.

The first floor has housed the Académie d'architecture since the 21st century, not 1967; the building's name recalls the d'Albert d'Ailly family, dukes of Chaulnes, who owned it from 1644. In the mid-19th century the tragedian Rachel lived on the first floor, and her funeral in January 1858 drew crowds to Place des Vosges. The politician Eugène Bethmont and the art historian Anatole de Montaiglon also lived here.

The mansion sits directly facing Place des Vosges, accessible via metro stations Saint-Paul or Bastille nearby. Visitors can view the exterior facade and arcades clearly from the square, making it easy to appreciate the architectural details without requiring special access.

The right wing in the courtyard was built by Jules Hardouin-Mansart for Charles d'Albert d'Ailly, 3rd Duke of Chaulnes (1625-1698). In the mid-19th century the tragedienne Rachel lived on the first floor; her funeral in January 1858 drew a crowd to Place des Vosges. The first floor now houses the Académie d'architecture.