Question: Which Frank Lloyd Wright house between the 1950's and 60's is the largest of the Usonian Automatics built: Theodore A. Pappas House, or Gerald B. and Beverley Tonkens House?
Context: The Ray Brandes House is a Frank Lloyd Wright designed Usonian home located at 2202 212th Avenue SE, Sammamish, Washington It was constructed in 1952.  The home is constructed in Frank Lloyd Wright's Usonian style which is designed to create flow between nature, the home and its interior.  It is one of the better preserved examples of this style, and one of three homes designed by Frank Lloyd Wright in Washington State.  Landscaping was selected from local flora and fauna, typical of Frank Lloyd Wright's preference. The Hause House project was one of the many un-built works designed by architect Frank Lloyd Wright in 1939.  This building structure was one of his Usonian designs that was a short-tailed rectangular plan to be located in Lansing, Michigan.  Although the structure was never built, it was developed into working drawings and was utilized in the creation of another Frank Lloyd Wright design for the Florida Southern College Faculty House.  The Hause House was a Usonian based on the design of wood board and batten exterior as many of them are, while the Florida Southern College Faculty House was a concrete structure.  Many similarities are seen on each floor plan with only minor changes due to the Hause projects site location. The Kraus House, also known as the Frank Lloyd Wright House in Ebsworth Park, is a house in Kirkwood, Missouri designed by architect Frank Lloyd Wright.  The house was designed and constructed for Russell and Ruth Goetz Kraus, and the initial design was conceived in 1950.  Construction continued until at least 1960 and was never formally completed.  The owners lived in the house for about 40 years (Ruth died in 1992). The Arthur B. Heurtley House is located in the Chicago suburb of Oak Park, Illinois, United States.  The house was designed by architect Frank Lloyd Wright and constructed in 1902.  The Heurtley House is considered one of the earliest examples of a Frank Lloyd Wright house in full Prairie style.  The house was added to the U.S. National Register of Historic Places when it was designated a National Historic Landmark on February 16, 2000. The Theodore A. Pappas House is a Frank Lloyd Wright designed Usonian house in St. Louis, Missouri.  The Pappas house was listed on the National Register of Historic Places in 1979, when it was only 15 years old.  It is one of two houses in St. Louis designed by Wright, the only Usonian Automatic in Missouri.  Wright designed it between 1955 and 1959 at the Pappas’ request, and Theodore and Bette Pappas built the house together with the help of day laborers between 1960 and 1964.  The Pappas house is a rambling four-bedroom house, and after the Gerald B. and Beverley Tonkens House, is the largest of the Usonian Automatics built. The Toufic H. Kalil House is a structure that was built by Frank Lloyd Wright in Manchester, New Hampshire, in 1955.  The Usonian Automatic design of this house allowed Wright to meet the requirements of Dr. Toufic and Mildred Kalil, a professional couple.  Wright used the term Usonian Automatic to describe the design of economical Usonian style houses constructed of modular concrete blocks.  This house illustrates Wright's creative use of this inexpensive material. The Frank Lloyd Wright Home and Studio is a historic house designed by renowned architect Frank Lloyd Wright.  Located at 951 Chicago Avenue in Oak Park, Illinois, the house has been restored by the Frank Lloyd Wright Preservation Trust to its appearance in 1909, the last year Frank Lloyd Wright lived there with his family.  Frank Lloyd Wright purchased the property and built the home in 1889 with a $5,000 loan from his employer Louis Sullivan.  He was 22 at the time, and newly wed to Catherine Tobin.  The Wrights raised six children in the home.  The building was listed on the National Register of Historic Places in 1972 and declared a National Historic Landmark four years later. The Gerald B. and Beverley Tonkens House, also known as the Tonkens House, is a single story private residence, designed by American architect Frank Lloyd Wright in 1954.  The house was commissioned by Gerald B. Tonkens (an automobile dealer) and his first wife Rosalie.  It is located in Amberley Village, a village in Hamilton County, Ohio. The Robert H. Sunday House is located in Marshalltown, Iowa, United States.  It was designed by Frank Lloyd Wright in the Usonian style, and was listed on the National Register of Historic Places in 1988.  Initially the Sunday's choose the Usonian Automatic, a natural concrete block model, for their home.  When it provided unworkable, Wright sent the plans for this house.  In style and materials it is very similar to the 1953 Usonian Exhibition House.  It was the sixth of seven houses designed by Wright and built in this style in Iowa.  Sunday, who owned Marshall Lumber in Marshalltown, acted as his own general contractor.  In fact, he and his wife did much of the work themselves.  It is also believed to be last of this style built in brick.  John H. Howe, a Wright assistant who supervised the initial construction, designed an addition to this house in 1970 that conforms seamlessly with the original.  It includes the family room, family room terrace, and the dining room.  The original house followed an "L" shaped plan, and with the addition it is now a "T" shaped plan.  Howe had previously designed (1964) the building for Sunday's business. Eddie's House was a doghouse designed by Frank Lloyd Wright for the Berger family of San Anselmo, California, to be used by their dog Eddie.  Wright designed Eddie's House to be in keeping with the family's home, known as the Robert Berger House, which he had previously designed.  The plans for the doghouse were completed by Wright in 1957, and the four square foot triangular house was built in 1963.  In 1973 Eddie's House was removed and thrown away, but in 2010 Jim and Eric Berger, sons of Robert Berger, rebuilt Eddie's House from the original plans for a segment in "Romanza", a documentary film by Michael Miner about Frank Lloyd Wright's architectural works in California.  The doghouse remains the smallest structure Frank Lloyd Wright ever designed.
Answer: Gerald B. and Beverley Tonkens House