Strong horizontal lines define Prairie Style house plans. Often associated with the Midwestern work of architectural innovator/visionary Frank Lloyd Wright, Prairie Style houses were designed to complement the flat prairie landscape. The typical Prairie Style house plan features sweeping horizontal lines and wide open floor plans. The Prairie Style house is conspicuously lacking in conventional ornamentation. A variety of geometric shapes and forms inspired by nature are highlighted through window arrangement, columns, low walls and planters, creating a visually appealing home. Prairie style house plans were especially popular in the Midwest from 1900 to 1930. The Prairie Style home appears to grow out of the ground; very low and close to the terrain with a low pitched hipped roof (sometimes gabled), windows set in groups and thoughtfully arranged, and an entrance that is typically secluded. Wright later developed a single story version of the Prairie Style house, but with stronger indoor-outdoor connections, that he called the Usonian house.