Frank Lloyd Wright, a pioneer of American architecture, left an indelible mark on the cityscape of Chicago. His works, characterized by the Prairie School movement, emphasize harmony with the environment and feature distinctive horizontal lines, flat or hipped roofs with broad overhangs, windows grouped in horizontal bands, solid construction, craftsmanship, and restraint in the use of decoration. Notable examples in Chicago include the Robie House, recognized as a cornerstone of modern architecture, and The Rookery building's light court and lobby, showcasing Wright's talent for interior design.