05/29/2009 05:12 am ET | Updated May 25, 2011

Frank Lloyd Wright's Unity Temple Named One Of America's Most Endangered Historic Places

Frank Lloyd Wright's 1909 Unity Temple was named Tuesday to the National Trust for Historic Preservation's 2009 list of the Eleven Most Endangered Historic Places. This may come as a shock to the thousands of visitors from all over the world who make the pilgrimage to Oak Park each year specifically to see one of the most important works of the self-proclaimed, and quite possibly actual "world's greatest architect."

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