Hôtel de Saint-Florentin, Neoclassical private mansion in 1st arrondissement of Paris, France.

The Hôtel de Saint-Florentin is a Neoclassical private mansion in the 1st arrondissement of Paris, featuring clean geometric lines and columns across its facades. The building spans multiple stories with symmetrically arranged rooms that reflect a formal layout characteristic of its era.

Louis Phélypeaux de Saint-Florentin bought the plot in 1767 and had Jean-François Chalgrin build the mansion to Ange-Jacques Gabriel's facade scheme for the Place Louis-XV, completed in 1769. Talleyrand purchased it in 1812 and hosted Tsar Alexander I there from 1 to 15 April 1814. James de Rothschild bought it in 1838 for 1.2 million francs, and Léon Ohnet doubled the Rue de Mondovi wing between 1868 and 1871.

The mansion carries three successive names: hôtel de La Vrillière, hôtel de l'Infantado and hôtel Talleyrand. Victor Hugo described Talleyrand as a spider in its web, drawing in Bonaparte, Sieyès, Madame de Staël and Tsar Alexander I. The baron James de Rothschild, who bought it in 1838, had an apartment rented to the princesse de Lieven, keeping the house a centre of diplomatic influence.

The mansion sits on Rue Saint-Florentin near Place de la Concorde and the Tuileries Gardens, easily accessible on foot. Its central Paris location makes it a natural stop on any walk through the historic district.

Talleyrand spread a rumour that all Crown palaces were mined to persuade Tsar Alexander I to lodge here; the tsar stayed from 1 to 15 April 1814, after Russian troops entered Paris on 31 March. Victor Hugo later described the mansion as a web in which Talleyrand caught heroes, kings and emperors.