Architecture of the United States New York City's Woolworth Building designed by architect Cass Gilbert, 1913. Raising previous technological advances to new heights, 793 ft (233 m), it was the world's tallest building until 1930. Frank Woolworth was fond of gothic cathedrals. Cass Gilbert constructed the office building as a cathedral of commerce and incorporated many Gothic revival decorative elements. The main entrance and lobby contain numerous allegories of thrift, including an acorn growing into an oak tree and a man losing his shirt. The popularity of the new Woolworth Building inspired many Gothic revival imitations among skyscrapers and remained a popular design theme until
Cass Building in a specially designed framing system that is almost invisible at first glance. The edges of the panes of glass comprise the wall abut giving the appearance of one sheet with no support. Four adjacent panes are fastened at their corners by an x-shaped bracket. The architectural firm relocated its offices in the early 1990s and the structure currently houses several employment agencies, daycare providers and Neighborhood Legal Services, which focus on meeting the needs of local Detroit residents. Detroit People Mover Station Fort/Cass is one-block east across Fort Street from the building and Cobo Center is one block south.