Herbert Johnson Jr. commissioned Frank Lloyd Wright to build Wingspread, his 14,000 sq. ft. Prairie style home, which was completed in 1939. The home features many characteristics of Mr. Wright's organic architecture, such as horizontal lines and low ceilings. Wingspread has four wings, each created for specific purposes. The home was occupied by Mr. Johnson and his wife, Irene Purcell, and his two children, Karen and Sam. The family lived in the home for twenty years. In 1959 they donated the home so it could be converted into the conference center, which it is now known as The Johnson Foundation at Wingspread.