Coonley House in Riverside, Illinois, is a major Frank Lloyd Wright residential estate built between 1908 and 1912 for Avery and Queene Ferry Coonley. Among Wright’s largest and most elaborate Prairie School works, it was conceived as an interconnected composition of buildings, courtyards, walls, gardens, and custom-designed interiors rather than a single block. Its zoned plan marked a first in Wright’s work and helped signal the maturity of his Prairie Style. Though altered, subdivided, nearly demolished in 1952, and damaged by fire in 1978, much of the design survived and was restored, leaving it a remarkably important preserved Wright residence and National Historic Landmark.