This thesis examines French architect Eugene-Emmanuel Viollet-le-Duc (1814-1879), who combined eighteenth-century Rationalism with the historicist, anti-academic message of Romanticism, which was impelling the nineteenth-century architectural reform movement into the industrial age. Sources used include Viollet-le-Duc's architectural drawings and published works, particularly volume one of his Entretiens sur l'Architecture. The study is arranged chronologically, and it discusses his career, his restoration work, and his demands for reform of architectural education. One chapter contains a detailed analysis of his Entretiens. This thesis concludes that Viollet-le-Duc was as much a historian as he was an architect, and it notes that his hopes for reform were realized in the twentieth century.