Knoxville is the third largest city in Tennessee with a total population of approximately 185,000. It served as the capital of Tennessee until 1819. Knoxville was named for the first Secretary of War, Henry Knox. Knoxville has been dubbed the Marble City since a number of quarries were active during the early 20th century. It was also known as the Underwear Capital of the World at one point, since, in the 1930s, at least 20 textile and clothing mills operated in the area and this was the city’s largest employer. It is home to the University of Tennessee’s main campus and is also the location of the Women’s Basketball Hall of Fame.