Cass Gilbert Minnesota, and the Library of Congress. Cass Gilbert is often confused with Charles Pierrepont Henry Gilbert, another prominent architect of the time. Cass Gilbert designed the famous Woolworth Building skyscraper on Broadway for Frank W. Woolworth, while Woolworth's personal mansion was designed by C. P. H. Gilbert. The Ukrainian Institute building on Manhattan's 5th Avenue is the work of C. P. H. Gilbert, and often incorrectly attributed to Cass Gilbert. Cass Gilbert should also not be confused with his son, architect Cass Gilbert, Jr. Notes Further reading Cass Gilbert Cass Gilbert (November 24, 1859 – May 17, 1934) was a
Cass Building Cass Building The Cass Building is a low-rise office building at 455 West Fort Street, at the southeast corner of First Street, in Detroit, Michigan. It is also known as Detroit's Work Place. The building was designed in 1910 by the architectural firm of Smith, Hinchman and Grylls as a warehouse on the western edge of the city's central business district. In 1972, the reinforced concrete building was purchased by the firm and remodeled as its new headquarters. The structure was stripped to its shell and new exterior walls constructed. The north and west facades were covered with tinted glass