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
James A. Farley Building post office. In 1913, the act was repealed partially in light of a scandal in which Taylor had picked his former Minnesota partner Cass Gilbert to design the Alexander Hamilton U.S. Custom House. The building prominently bears the inscription: "Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds," which is frequently mistaken as the official motto of the United States Postal Service. It was actually supplied by William Mitchell Kendall of the firm of McKim, Mead & White, the architects who designed the Farley Building and the original