Hill-Stead Museum, set on 152 acres, was the retirement home of Cleveland iron industrialist Alfred Atmore Pope and his wife Ada Brooks. The Colonial Revival-style mansion, completed in 1901, was designed by pioneering female architect Theodate Pope (Alfred's and Ada's daugher) with the help of New York architectural firm McKim, Mead and White. Theodate also enlisted the help of landscape architect Warren Manning, a protege of Fredrick Law Olmsted, in designing the grounds. A centerpiece of Hill-Stead's property is the c. 1920, Beatrix Farrand-designed Sunken Garden. This "subterranean" garden boasts a summerhouse, yew hedge, brick walkways and 36-bed perennial garden with over 90 plant varieties. Little of Farrand's admiration for Gertrude Jekyll is apparent in the design.