Hector-Martin Lefuel was a French architect, best known for his work on the Palais du Louvre, including Napoleon III's Louvre expansion and the reconstruction of the Pavillon de Flore.

The Louvre Palace, often referred to simply as the Louvre, is an iconic French palace located on the Right Bank of the Seine in Paris, occupying a vast expanse of land between the Tuileries Gardens and the church of Saint-Germain l'Auxerrois. Originally a defensive castle, it has served numerous government-related functions in the past, including intermittently as a royal residence between the 14th and 18th centuries. It is now mostly used by the Louvre Museum, which first opened there in 1793.