Batavia was founded in 1833, and is the oldest city in Kane County, Illinois, with a small portion in DuPage County. During the Industrial Revolution, Batavia became known as ‘The Windmill City’ for being the largest windmill producer of the time. Fermilab, a federal government-sponsored high-energy physics laboratory, where both the bottom quark and top quarks were first detected, is located here. Batavia is part of a Tri-Cities area, along with St. Charles and Geneva. As of the 2000 U.S. census, the city had a total population of 23,866. A 2003 special census put the city's population at 25,246. The official 2008 population estimate from the U.S. Census Bureau for the city of Batavia is 27,502.