Information was gathered in a study of the interior color scheme, fabrics and furniture of the Frank Lloyd Wright designed house Graycliff. The house is situated on a cliff overlooking Lake Erie in Derby, New York. It was designed by Wright in 1926 for Isabelle Martin, the wife of the industrialist Darwin Martin. Wright designed both freestanding and built-in furniture for the house interior and also suggested colors and fabrics. Extensive written documentation and original photographs found in the archives of the State University of New York at Buffalo have been utilized to determine the colors, materials and furniture original to the house. Physical evidence found on the remaining original furniture, moldings and upholstered pillows provides information about finishes, construction and show cover fabrics. Information on historic methods and materials from the period is provided for comparison with the physical evidence along with scientific analysis of finishes. The conservation treatment methods are also discussed. This technical and historical information is helpful for conservators and curators to better understand the materials and construction used in Frank Lloyd Wright designs during this time period. It also promotes the proper care and conservation treatment of these objects while preserving original finishes and the historic intent of the house.