Aurora is the second most populous city in the U.S. state of Illinois. Part of the Chicago metropolitan area, its estimated population in 2010 was 197,899. The city officially adopted the nickname "The City of Lights" in 1908, because it was one of the first cities in the United States to implement an all-electric street lighting system in 1881. Aurora's historic downtown is located on the Fox River, and centered on Stolp Island.
The Aurora area is home to an impressive collection of architecture, including structures by Frank Lloyd Wright, Ludwig Mies van der Rohe, Bruce Goff and George Grant Elmslie. The Hollywood Casino Aurora, a dockside gaming facility with 53,000 square feet (4,900 m2) and 1,200 gaming positions, is located on the river in downtown Aurora. Aurora is also home to a large collection of Sears Catalog Homes (over 50 homes) and Lustron all-steel homes (seven homes).