Modern architecture emphasizes form over ornament, prioritizes functionalism, and utilizes innovative materials like glass, steel, and reinforced concrete. It emerged in the early 20th century, influenced by movements such as the Bauhaus and notable architects like Frank Lloyd Wright, and became dominant until the rise of postmodern architecture in the 1980s. Key features of modern architecture include clean lines, horizontal massing, and generous use of glass to create open, flowing spaces.