There is a historical display on the second floor near the South Entrance that is maintained by the Joliet Central Historical Society. Many archived items are kept in a vault; the display includes the original Steelman sculpture and conceptual models of it from the 1933 Chicago World's Fair. The Steelman was sculpted by Louise Lentz Woodruff and is positioned with its hands behind a male and female, symbolizing technology advancing humans. It is surrounded by the original relief panels representing the basic sciences: astronomy, mathematics, physics, chemistry, botany, zoology, medicine, and geology. It has long been considered good luck to rub the right knee of the male before any test or sporting events; therefore, the knee has been worn away and reconstituted over the years.