At the turn of the 20th century, encouraged by the Civic Committee of the Des Moines Women's Club, Des Moines undertook a "City Beautiful" project in which large Beaux Arts public buildings and fountains were constructed along the Des Moines River. The former Des Moines Public Library building (now the home of the World Food Prize); the United States central Post Office, built by the federal government (now the Polk County Administrative Building, with a newer addition); and the City Hall are surviving examples of the 1900–1910 buildings. They form the Civic Center Historic District.