Modernist architecture emerged in the early 20th century, emphasizing simplicity, functionality, and rejection of ornament. It embraced "form follows function," utilizing clean lines, geometric forms, and industrial materials like steel and concrete to create a modern aesthetic. Key figures like Le Corbusier, Mies van der Rohe, and Frank Lloyd Wright pioneered this movement. Their iconic works, such as Villa Savoye and Fallingwater, showcased modernist principles and had a lasting impact on architectural design and urban planning.