Hôtel de Coislin

Hôtel de Coislin is an 18th-century mansion standing at the corner of Place de la Concorde and Rue Royale in Paris, one of a pair of matching buildings that frame the square's northern edge.

Who built it and when?

Architect Ange-Jacques Gabriel, the designer behind the entire Place de la Concorde layout, completed the building in 1770. It was commissioned by Marie-Anne de Mailly-Rubempré, marquise de Coislin, who gave the mansion its name and lived there from its construction until her death in 1817. Gabriel raised it alongside the neighboring Hôtel Moreau-Desproux, so the two structures rise as a matched pair closing the square opposite the Madeleine church.

Why does the building matter to American history?

On February 6, 1778, representatives gathered inside the mansion to sign the first treaties of friendship, commerce and alliance between France and the fledgling United States. Conrad Alexandre Gérard signed for France, while Benjamin Franklin, Silas Deane and Arthur Lee represented the American side. The agreements marked France's formal recognition of American independence and committed the kingdom to military support against Britain. Historians still point to this single afternoon as the founding moment of the Franco-American alliance, and the mansion is sometimes described as the birthplace of that relationship.

Which notable figures spent time there?

Between 1805 and 1807, writer and diplomat François-René de Chateaubriand lodged in the mansion as a guest of the marquise. In 1866 the building became home to the Cercle de la rue Royale, an exclusive gentlemen's club drawn from Parisian high society. Two years later, in 1868, twelve members of the circle posed on the mansion's balcony for painter James Tissot, whose resulting canvas became one of the most reproduced images of upper-class social life under the Second Empire.

Is the building protected as a historic monument?

Yes. The facade received historic-monument listing in 1923, and in 1962 protection was extended to the main salon, the interior elevation and the decorative fittings inside. The whole Place de la Concorde ensemble, including Hôtel de Coislin, falls within the Paris stretch inscribed on UNESCO's World Heritage list under "Paris, Banks of the Seine."

What should visitors notice nearby?

The mansion sits directly beside Hôtel de Crillon and the former headquarters of the Automobile Club de France, together forming one of the most photographed skylines in central Paris. Walking across the square, look for the matching colonnades and rooftop balustrades on both buildings — Gabriel designed the symmetry deliberately, turning the square into a ceremonial gateway into the city.

Frequently asked questions

Can visitors go inside Hôtel de Coislin? The building serves private and institutional functions today, so the interior is not open for regular public visits; the facade and colonnade can be admired from the square.

Where does the name come from? It comes from its first owner, the marquise de Coislin, for whom the mansion was built in 1770.

What is its connection to United States history? France and the United States signed their first alliance treaties inside the building in 1778, making it a landmark site in the early history of American diplomacy in Europe.

How do you get there? The mansion stands right on Place de la Concorde, next to Rue Royale, close to the Concorde metro station served by lines 1, 8 and 12.