Which architect designed the Woolworth building?

Cass Gilbert (November 24, 1859 – May 17, 1934) was a prominent American architect. He was an early proponent of skyscrapers, his works include the Woolworth Building, the United States Supreme Court building, the state capitols of Minnesota, Arkansas and West Virginia. His public buildings in the Beaux Arts style reflect the optimistic American sense that the nation was heir to Greek democracy, Roman law and Renaissance humanism. Gilbert's achievements were recognized in his lifetime; he served as president of the "American Institute of Architects" in 1908–09.

Born in Zanesville, Ohio, the middle of three sons. Gilbert's father General Samuel A. Gilbert was a Union veteran of the American Civil War and a surveyor for the United States Coast Survey. He began his architectural career at age 17 by joining the Abraham M. Radcliffe office in St. Paul. Gilbert was a conservative who believed architecture should reflect historic traditions and the established social order.

The Woolworth Building is bounded by Broadway and City Hall Park to its east, Park Place to its north, and Barclay Street to its south. It consists of a 30-story base topped by a 30-story tower. Its facade is mostly decorated with architectural terracotta, though the lower portions are limestone. It was the tallest building in the world from 1913 to 1930, with a height of 792 feet (241 m). More than a century after its construction, it remains one of the 100 tallest buildings in the United States.