This dissertation traces the career of Simon-Claude Constant-Dufeux (1801-1871), an important, yet little-studied, architect and educator who played a central role in mid-nineteenth-century architectural culture and pedagogy in France. In his writings, his designs, and his teachings at the École des Beaux-Arts and in the private atelier established in 1836, Constant-Dufeux presented architecture as a discipline primarily concerned with symbolic expression and communication. Constant-Dufeux played a key role in determining what would later be called, the Néo-Grec façade. Moreover, his influential teachings on the unity of the arts, his attention to the burgeoning field of aesthetics, and his interest in ornamental design, left a lasting impr...