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 Gilbert declined among some professionals during the age of Modernism, but he was on the design committee that guided and eventually approved the modernist design of Manhattan's groundbreaking Rockefeller Center. Gilbert's body of work as a whole is more eclectic than many critics admit. In particular, his Union Station in New Haven lacks the embellishments common of the Beaux-Arts period and contains the simple lines common in Modernism. Gilbert wrote to a colleague, "I sometimes wish I had never built the Woolworth Building because I fear it may be regarded as my only work and you and I both know that