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Key figures

Origin and history

The Thiroux de Lailly hotel, sometimes nicknamed "Hôtel de Montmorency", is a Parisian mansion built at No. 5 on Rue de Montmorency, in the historic Marais district (3rd arrondissement). Its alternative name recalls its location on a former hotel belonging to the family of Montmorency until 1632. This monument illustrates the civil architecture of the Enlightenment century, with a classical courtyard and remarkable interior decorations.

Built between 1739 and 1741 for Jean-Louis Thiroux de Lailly, a post office farmer, the hotel is the work of architect Michel Tannevot and master mason Jean-Pierre Langiboust. Its interior decoration is distinguished by woodwork carved by Nicolas Pineau, some of which were transferred to the Wadiesdon Manor (United Kingdom) for the Rothschild. A neoclassical fountain still adorns its garden, while its useful surface is 2,053 m2.

Owned by the State since an unspecified date, the hotel houses public finance services. Its courtyard, facades and the first two flights of stairs have been protected as historical monuments since 17 March 1925. The state announced its sale for October 2025, marking a turning point in its recent history.

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