(1743–1828). French architect and theoretician. He studied under J. -F. Blondel and assisted Soufflot during the construction of Ste-Geneviève, Paris, afterwards (with Maximilien Brébion (1716–96) and François Soufflot (before 1764–1802)) directing the works. He altered the building (1791–1812) under Quatremère de Quincy when it was converted into the Panthéon. He is best known for his Traité théorique et pratique de l'art de bâtir (Theoretical and Practical Treatise on the Art of Building—1802–17), although he also published a Mémoire sur l'Architecture (1789), and other works, including well over 100 entries on construction for the Encylopédie Méthodique (1788–1820).
From A Dictionary of Architecture and Landscape Architecture in Oxford Reference.