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Heritage classified

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Origin and history

The Hotel Thiroux de Lailly, often called "Hotel de Montmorency", is a Parisian mansion located at 5 rue de Montmorency, in the historic Marais district. Although its name evokes the prestigious house of Montmorency, the present building was built much later, between 1739 and 1741, for Jean-Louis Thiroux de Lailly, then general postal farmer. The architect Michel Tannevot and the master mason Jean-Pierre Langiboust led the construction of the building on the site of an old hotel that had belonged to the Montmorency until 1632. This project was part of the architectural renewal of the Marais, which was then popular with the aristocracy and the rising bourgeoisie.

The interior of the hotel is distinguished by refined woodwork and a carved fountain, works by ornamentalist Nicolas Pineau, a major figure in the rock style. Some woodwork was later transferred to Wadiesdon Manor in England, acquired by the Rothschild family, demonstrating their artistic value. The courtyard, the facades on the street and on the courtyard, as well as the first two flights of the staircase were protected as early as 1925 by an inscription to the Historical Monuments, recognizing their heritage interest. Today owned by the State, the hotel houses public finance services, although its sale is planned for October 2025.

A remarkable element of the garden is a neoclassical fountain, adding a touch of elegance to this architectural ensemble. The hotel thus illustrates the evolution of tastes between the 18th century — marked by the opulence of general farmers — and modern heritage concerns. Its history also reflects the changes in the Marais, from an aristocratic neighborhood to a space combining administration, culture and preserved habitat.

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