Chicago (Listeni/ʃɪˈkɑːɡoʊ/ or /ʃɪˈkɔːɡoʊ/) is the third most populous city in the United States, after New York City and Los Angeles. With 2.7 million residents, it is the most populous city in both the U.S. state of Illinois and the American Midwest. Its metropolitan area, sometimes called Chicagoland, is home to 9.5 million people and is the third-largest in the United States. Chicago is the seat of Cook County, although a small part of the city extends into DuPage County.
Chicago was incorporated as a city in 1837, near a portage between the Great Lakes and the Mississippi River watershed, and experienced rapid growth in the mid-nineteenth century. Today, the city is an international hub for finance, commerce, industry, technology, telecommunications, and transportation, with O’Hare International Airport being the second-busiest airport in the world; it also has the largest number of U.S. highways, and railroad freight entering its region. In 2010, Chicago was listed as an alpha+ global city by the Globalization and World Cities Research Network, and ranks seventh in the world in the 2012 Global Cities Index. As of 2012, Chicago had the third largest gross metropolitan product in the United States, after the New York City and Los Angeles metropolitan areas, at a sum of US$571 billion.
In 2012, Chicago hosted 46.37 million international and domestic visitors, an overall visitation record. Chicago’s culture includes contributions to the visual arts, novels, film, theater, especially improvisational comedy, and music, particularly jazz, blues, soul, and the creation of house music. The city has many nicknames, which reflect the impressions and opinions about historical and contemporary Chicago. The best-known include the «Windy City» and «Second City.» Chicago has professional sports teams in each of the major professional leagues.
The name «Chicago» is derived from a French rendering of the Native American word shikaakwa, translated as «wild onion» or «wild garlic», from the Miami-Illinois language. The first known reference to the site of the current city of Chicago as «Checagou» was by Robert de LaSalle around 1679 in a memoir written about the time. Henri Joutel, in his journal of 1688, noted that the wild garlic, called «chicagoua,» grew abundantly in the area. During the mid-18th century, the area was inhabited by a Native American tribe known as the Potawatomi, who had taken the place of the Miami and Sauk and Fox peoples. The 1780s saw the arrival of the first known non-indigenous permanent settler in Chicago, Jean Baptiste Point du Sable, who was of African and European (French) descent.
In 1795, following the Northwest Indian War, an area that was to be part of Chicago was turned over to the United States for a military post by native tribes in accordance with the Treaty of Greenville. In 1803, the United States Army built Fort Dearborn, which was destroyed in the War of 1812, Battle of Fort Dearborn and later rebuilt. The Ottawa, Ojibwe, and Potawatomi tribes had ceded additional land to the United States in the 1816 Treaty of St. Louis. The Potawatomi were eventually forcibly removed from their land following the Treaty of Chicago in 1833.
The destruction caused by the Great Chicago Fire led to the largest building boom in the history of the nation. In 1885, the first steel-framed high-rise building, the Home Insurance Building, rose in the city as Chicago ushered in the skyscraper era, which would then be followed by many other cities around the world. Today, Chicago’s skyline is among the world’s tallest and most dense.
Some of the United States’ tallest towers are located in Chicago; Willis Tower (formerly Sears Tower) is the second tallest building in the Western Hemisphere after One World Trade Center, and Trump International Hotel and Tower is the third tallest in the country. The Loop’s historic buildings include the Chicago Board of Trade Building, the Fine Arts Building, 35 East Wacker, and the Chicago Building, 860-880 Lake Shore Drive Apartments by Mies van der Rohe. Many other architects have left their impression on the Chicago skyline such as Daniel Burnham, Louis Sullivan, Charles B. Atwood, John Root, and Helmut Jahn.
The Merchandise Mart, once first on the list of largest buildings in the world, currently listed as 44th largest (as of September 9, 2013), has its own zip code, and stands near the junction of the North and South branches of the Chicago River. Presently, the four tallest buildings in the city are Willis Tower (formerly the Sears Tower, also a building with its own zip code), Trump International Hotel and Tower, the Aon Center (previously the Standard Oil Building), and the John Hancock Center. Industrial districts, such as some areas on the South Side, the areas along the Chicago Sanitary and Ship Canal, and Northwest Indiana are clustered.
Chicago gave its name to the Chicago School and was home to the Prairie School, two movements in architecture. Multiple kinds and scales of houses, townhouses, condominiums, and apartment buildings can be found throughout Chicago. Large swaths of the city’s residential areas away from the lake are characterized by brick bungalows built from the early 20th century through the end of World War II. Chicago is also a prominent center of the Polish Cathedral style of church architecture. The Chicago suburb of Oak Park was home to famous architect Frank Lloyd Wright, who had designed The Robie House located near the University of Chicago.
All information about Chicago courtesy of Wikipedia.