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
Lewis Cass Its purpose was to map the region and locate the source of the Mississippi River. The headwater of the great river was then unknown, resulting in an undefined border between the United States and British North America, which had been linked to the river. The Cass expedition erroneously identified what became known as Cass Lake as the Mississippi's source. It was not until 1832 that Henry Rowe Schoolcraft, the Cass expedition's geologist, identified nearby Lake Itasca as the headwater of the Mississippi. On August 1, 1831, Cass resigned as governor of the Michigan Territory to take the post of Secretary