Highly influenced by the famous architect Frank Lloyd Wright, the Prairie House style was most popular from 1900 to 1930 in the American Midwest. The typical low-pitched roof and overhanging eaves give these homes a flat, horizontal appearance. Earthy materials like stone and brick are common for the foundation, and solid masonry piers make for a boxy, geometric appearance. Original designs, often referred to as a Prairie Box or American Foursquare, have a square footprint, but modern versions may include projecting rooms. The open floor plan is illuminated by rows of small windows and sometimes accented by a central chimney.