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.
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