Dana-Thomas House Foundation, P.O. Box 7123, Springfield, IL 62791
The Dana-Thomas House Foundation is a 501 (C) (3) not for profit organization, incorporated in 1983 to promote, preserve and protect the Frank Lloyd Wright-designed Dana-Thomas House. The board of directors, members and volunteers work to promote the site and to foster interest in Frank Lloyd Wright and Susan Lawrence Dana through educational programs, events and publications. The Foundation also operates the Sumac Shop museum store on site in the Carriage House.