The original and controversial architecture of Frank Lloyd Wright and Le Corbusier has had a profound influence on 20th-century architecture worldwide. In this fully-illustrated work Etlin offers his insights into the influence that formed the basis for the architectural development of arguably the greatest architects of the 20th century. He focuses on the main principles of progressive 19th-century architectural thought: the architectural system; the picturesque; philosphical eclecticism; and the spirit of the times. These principles, which have guided modern architecture over the past 200 years, are explored in great detail in relation to 19th- and 20th-century architecture, and clearly demonstrate their fundamental importance to the work of Frank Lloyd Wright and Le Corbusier. Richard Etlin was awarded book prizes from the Society of Architectural Historians, the Association of American Publishers and the American Institute of Architects for his previous publication, 'Modernism in Italian Architecture 1890-1840' (MIT, 1991).