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Center for Architecture - presents the history of American skyscraper construction. The very first skyscraper is considered to be the Home Insurance Building built by the architect William Le Baron Jenney in 1885 in Chicago, which lasted until 1931. Initially, it had 10 floors, and in 1891 two more were added. Today[when?] 5 of the 10 tallest buildings in the US and 10 of the 50 tallest buildings in the world are in Chicago. Also, according to the project of the architect Santiago Calatrava, the construction of the Chicago Spire was planned and started in 2007. The building, 609 meters high, shaped like a drill, was supposed to be completed by 2012, but in 2008 the project was suspended.

The Chicago Loop is downtown Chicago, the second largest in the United States after Manhattan. It houses stock exchanges, the headquarters of such well-known companies as United Airlines, Chase Bank, Boeing and others. Main shopping street State Street; LaSalle Street, called Chicago's Wall Street; Michigan Avenue, considered the most beautiful street in the city, part of which - the "Magnificent Mile" - is famous for its luxurious hotels, restaurants and shops

The second financial center of the United States
One of the 12 federal reserve banks is located in Chicago, the Federal Reserve Bank of Chicago, the largest exchanges - the Chicago Board of Trade and the Chicago Mercantile Exchange, united in the CME Group, the Chicago Stock Exchange, the Chicago Stock Exchange.

O'Hare International Airport is located west of Chicago and is located outside the city limits (in the city of Park Ridge), although it administratively belongs to Chicago. This is one of the largest airports in the world. It has 4 terminals: 1, 2, 3 - for domestic airlines, and the 5th terminal - international (number 4 is assigned to the bus terminal at the airport).

Chicago Transit Authority (CTA) - The Chicago Transportation Authority operates the second largest public transit system in the United States, with 152 bus routes and 8 subway lines. CTA transports 1.4 million passengers daily: buses carry about a million passengers daily, and another half a million people use metro trains. CTA routes cover all of Chicago and 40 nearby suburbs. The blue and orange CTA train lines link the city center with the city's airports.
Metra is a commuter rail system serving Chicago and the six surrounding counties of Illinois and northwestern Indiana. Metra trains serve about 200 railway stations located on 11 lines. Only one of them is electrified, the rest use diesel traction.
Pace[en] is a commuter bus service serving primarily the six counties of Illinois surrounding Chicago, as well as several routes within the city itself.
Airports
Chicago is served by two major airports and several smaller ones.

First mentioned in 1673[11]. In 1674, a missionary post was founded on the site of modern Chicago by the French Jesuit Jacques Marquette.
At the end of the 18th century, Jean-Baptiste Pointe du Sable, a black merchant of French origin, founded a trading post on the site of the future city, who is currently considered the official founder of the city. However, Chicago appeared on the map only in 1833 as a settlement with a population of 350 people[12]. The name Chicago (originally pronounced Shikago) is a French modified word from the native Miami-Illinois language shikaakwa, which means wild onion or garlic[13][14][15][16] (Allium tricoccum[en]).

58 million tourists made Chicago the second most visited US city in 2018, just behind New York City with 65 million. The city was named first in the world in the Time Out City Life Index[10]. Attractions include Millennium Park, Art Institute of Chicago, Museum Campus, and Willis Tower. Chicago's culture includes the visual arts, literature, films, theatre, comedy (especially impromptu), food, and music (especially jazz, blues, soul, hip-hop, and EDM.) Colleges of prestige include the University of Chicago, Northwestern University, and Illinois university in Chicago. Chicago also has professional sports teams, including two from Major League Baseball.

Chicago is an international center for finance, culture, commerce, industry, education, technology, telecommunications, and transportation. Here the Chicago Board of Trade was created, which is one of the largest and most diverse markets for derivatives[7]. Depending on the year, O'Hare International Airport is the fifth or sixth busiest airport in the world[8]. The region also has the largest number of federal highways. According to the Globalization and World Cities Research Network[en], Chicago is an alpha global city and the 12th global city in the world. The Chicago area has one of the largest GDP in the world - in 2018 it was $689 billion[9]. The city has a diverse and balanced economy, and no industry has more than 14% of all workers[7]. Chicago is home to some Fortune 500 companies including Boeing, Kraft Heinz, McDonald's, Sears and Walgreens.

Located on the shores of Lake Michigan, Chicago became a city in 1837 next to a channel between the Great Lakes and the Mississippi River and grew rapidly in the middle of the 19th century [4]. After the Great Fire, which destroyed several square miles and left more than 100,000 people homeless, the city made significant efforts to rebuild [5]. A surge in construction accelerated population growth for several decades, and in 1900, less than thirty years after the fire, Chicago became the fifth largest city in the world. Chicago contributed to the development of urban planning and zoning, including new building styles, the development of the Beautiful City movement, and steel skyscrapers.

Chicago (English Chicago, American pronunciation: [ʃɪˈkɑːɡoʊ] (Sound to listen)), officially the City of Chicago, is the most populous city in Illinois and the third most populous city in the United States. With an estimated population of 2,747,000 in 2022, it is also the largest city in the Midwest. Chicago is the county seat of Cook County, the second most populous county in the United States, with a small portion of the city in DuPage County. Chicago is the main city of the Chicago metropolitan area, sometimes referred to as "Chicagoland". With a population of almost 10 million, this metropolitan area is the third largest in the United States.