This photo provided by the Frank Lloyd Preservation Trust shows the playroom at the famous architect's home and studio in Oak Park, Ill., which draws some 80,000 visitors a year. Oak Park is home to 29 Wright-designed structures, the largest collection of Wright sites in any one place in the world. (AP Photo/Frank Lloyd Wright Preservation Trust/Hedrich-Blessing)

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This photo provided by the Frank Lloyd Wright Preservation Trust shows the exterior of the home side of the Frank Lloyd Wright Home and Studio in Oak Park, Ill., which was built in 1889 as Wright's family home and went through several renovations through 1898. This is where the famous architect developed Prairie style architecture. The home side of the building provided access to the family home. (AP Photo/Frank Lloyd Wright Preservation Trust/Don Kalec)

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This undated photo provided by the Frank Lloyd Wright Preservation Trust shows the exterior of the studio side of the Frank Lloyd Wright Home and Studio in Oak Park, Ill., which was built in 1889 as Wright's family home and went through several renovations through 1898. This is where the famous architect developed Prairie style architecture. The studio side of the building accessed Wright's offices and drafting studio. (AP Photo/Frank Lloyd Wright Preservation Trust/Tim Long)

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This photo provided by the Frank Lloyd Wright Preservation Trust shows the dining room at the famous architect's home and studio in Oak Park, Ill., which draws some 80,000 visitors a year. Oak Park is home to 29 Wright-designed structures, the largest collection of Wright sites in any one place in the world. (AP Photo/Frank Lloyd Wright Preservation Trust/Tim Long)

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