He was born in Versailles, the son of Alexandre Henry Lefuel, an entrepreneurial speculative builder established in the town of Versailles, who was admitted to the École des Beaux-Arts in 1829; there he studied with Jean-Nicolas Huyot and in 1833 he received second place in the Prix de Rome competition. A winner of the Prix de Rome in 1839, he spent the years 1840 to 1844 as a pensionary of the French Academy in Rome at the Villa Medici. On his return to France he opened his own practice and was appointed an inspector for the Chambre des députés. Having carried out alterations as the Château de Meudon and for the housing of the Manufacture Royal de Porcelaine de Sèvres, he was appointed chief architect of the Château de Fontainebleau, one of the main seats of Napoleon III and the Second French Empire; there he designed a new Imperial theatre. He was elected to the Académie des beaux-arts in 1855, taking the chair of Martin-Pierre Gauthier. He was made a chevalier of the Legion of Honour in 1854, and a Commander of the Legion in 1857. , north facade At the same time Lefuel was placed in charge of the ambitious project of completing the Louvre, following the death of the architect Louis-Tullius-Joachim Visconti in 1853. Adjusting and enriching Visconti's project he completed the project, one of the showpieces of the Second Empire. Lefuel produced the Salle des États in the extended northern wing facing the Place du Palais-Royal Aiding Lefuel was the young American architectRichard Morris Hunt, who had studied under Lefuel at the École des Beaux-Arts. Following Hunt's graduation, Lefuel made Hunt inspector of the Louvre work and allowed him to design the facade of the Pavillon de la Bibliothèque. Lefuel's work at the Pavillon de Flore which had been begun under Visconti was to the order of Napoléon III, who in 1861 authorized its remodeling. The renovation, performed between 1864 and 1868, added significant detail and sculpture to the work, which is thus noted as an example of Second Empire Neo-Baroque architecture as much as it is of the late sixteenth century. After the Tuileries Palace was destroyed by fire in 1871, Lefuel added a north facade, similar in design to his south facade, in 1874-1879. For the Empress Eugénie, Lefuel created sumptuous apartments in the Palais des Tuileries, lost when that palace burned in the Paris Commune of 1871. Lefuel also designed and erected the hôtel particulier of Achille Fould, Minister of Finance under Napoléon III, and that of the museum directorÉmilien de Nieuwerkerke and the Hôtel Émonville in Abbeville. He designed funeral monuments, such as that to the composers Daniel-François-Esprit Auber and François Bazin at Père Lachaise Cemetery. For the Paris Exposition of 1855 he built the temporary Palais des Beaux-Arts et de l'Industrie. His palace in Louis XIII style at Neudeck, Polish Silesia, built in 1868-1872, the grandest of three residences there of the Donnersmarcks, was burnt out in 1945 and demolished in 1961. Hector Lefuel died in Paris and is buried at Passy Cemetery.
