The Prairie School is an architectural style that emerged in the late 19th and early 20th centuries, primarily in the American Midwest. It is characterized by horizontal lines, flat or hipped roofs with broad overhanging eaves, and open interior spaces. This style aimed to create harmony with the surrounding landscape, reflecting the vast, flat prairies of the region. Key figures in the Prairie School movement include architects like Frank Lloyd Wright and Louis Sullivan. Their designs often featured natural materials, such as wood and stone, and emphasized craftsmanship. The style is considered a precursor to modern architecture, influencing later movements with its focus on simplicity and integration with nature.