United States Custom House, Court House, and Post Office (Chicago, Illinois, 1880)

Flamingo, created by noted American artist Alexander Calder, is a 53-foot (16 m) tall stabile located in the Federal Plaza in front of the Kluczynski Federal Building in Chicago, Illinois, United States. It was commissioned by the United States General Services Administration and was unveiled in 1974, although Calder's signature on the sculpture indicates it was constructed in 1973.

The Kluczynski Federal Building is a skyscraper in the downtown Chicago Loop located at 230 South Dearborn Street. The 45-story structure was designed by Ludwig Mies van der Rohe and completed in 1974 as the last portion of the new Federal Center. It is 562 feet (171 m) tall and with the Mies designed post office and plaza stands on the site previously occupied by the Chicago Federal Building by the architect Henry Ives Cobb. It was named in honor of U.S. Congressman John C. Kluczynski, who represented Illinois's 5th congressional district from 1951 to 1975 after his death that year. This is one of three buildings by van der Rohe in the Federal Center Plaza complex: the others are the Loop Station Post Office and the Everett McKinley Dirksen United States Courthouse. The Kluczynski Building is constructed of a steel frame and contains 1,200,000 sq ft (110,000 m2) of space. The exterior is sheathed in bronze-tinted glass set into bright aluminum frames. Beneath the windows are steel spandrel panels painted flat black and windows are separated horizontally by steel mullions of projecting steel I-beams also painted black. The two-story lobby is recessed allowing for a colonnade or pilotis to encircle the building at street level. The interior walls and floors of the lobby are covered in granite which extends to the plaza. The lobby contains several commemorative tablets which were removed from the previous building. The entire complex is based on a 28 ft (8.5 m) grid pattern so that seams of the granite pavers in the plaza extend into the building lobbies and up the sides to create unity among the three structures. The Center is similar to Mies' earlier Toronto-Dominion Centre and was expanded in 1991 with the addition of the 28-story Metcalfe Federal Building to the south across Jackson Boulevard.In 2009, GSA undertook a major project to improve energy efficiency which included solar film on windows, LED lighting upgraded HVAC and other mechanical systems. After the work, the building received a LEED Silver certification.Alexander Calder's sculpture Flamingo, a 53-foot (16 m) red steel sculpture, was unveiled on the plaza October 24, 1974. The sculpture was conserved and restored in 1998. The plaza is also the site of a weekly farmers' market during the spring and summer seasons, open to the community. Federal agencies in the building include the Air Force Recruiting Service, the Department of State Passport Agency, Department of Labor, Internal Revenue Service, Office of Personnel Management, Consumer Product Safety Commission, General Services Administration and offices for both the U.S. senators from Illinois, Richard "Dick" Durbin and Tammy Duckworth.Following his election as president on November 4, 2008, Barack Obama established his administration's transitional offices in the federal building, prompting heightened security measures in the surrounding area.

The Marquette Building, completed in 1895, is a Chicago landmark that was built by the George A. Fuller Company and designed by architects Holabird & Roche. The building is currently owned by the John D. and Catherine T. MacArthur Foundation. It is located in the community area known as the "Loop" in Cook County, Illinois, United States. The building was one of the early steel frame skyscrapers of its day, and is considered one of the best examples of the Chicago School of architecture. The building originally had a reddish, terra cotta exterior that, prior to restoration, was somewhat blackened due to decades of Loop soot. It is noted both for its then cutting edge frame and its ornate interior. Since construction, the building has received numerous awards and honors. It was designated a Chicago Landmark on June 9, 1975, and is considered an architectural masterpiece. It was added to the National Register of Historic Places on August 17, 1973 and named a National Historic Landmark on January 7, 1976. The building's preservation has been a major focus of the Landmarks Preservation Council of Illinois. The John D. and Catherine T. MacArthur Foundation completed an extensive four-year restoration in 2006.

The Union League Club of Chicago is a prominent civic and social club in Chicago that was founded in 1879. Its second and current clubhouse is located at 65 W Jackson Boulevard on the corner of Federal Street, in the Loop neighborhood of Chicago. The club is considered one of the most prestigious in Chicago, ranking fifth in the United States and second in Chicago on the Five Star Platinum Club list. Union League clubs, which are legally separate but share similar histories and maintain reciprocal links with one another, are also located in New York City and Philadelphia. Additional Union League clubs were formerly located in Brooklyn, New York and New Haven.

Jackson (also Jackson/Dearborn) is an 'L' station on the CTA's Blue Line, located in the Loop. This station was recently renovated to resemble the Jackson/State station; a pedestrian tunnel connects these two stations, allowing for a free transfer to the Red Line. Farecard transfers to the Harold Washington Library – State/Van Buren station are also available at this station for the Brown, Orange, Pink, and Purple Lines. This is the southernmost of the three stations on one long continuous platform underneath Dearborn Street, with the stops at Monroe and Washington being the other two.

The Chicago Tunnel Company was the builder and operator of a 2 ft (610 mm) narrow-gauge railway freight tunnel network under downtown Chicago, Illinois. This was regulated by the Interstate Commerce Commission as an interurban even though it operated entirely under central Chicago, did not carry passengers, and was entirely underground. It inspired the construction of the London Post Office Railway.

The Everett McKinley Dirksen United States Courthouse, commonly referred to as the Dirksen Federal Building, is a skyscraper in the Chicago Loop at 219 South Dearborn Street. It was designed by Ludwig Mies van der Rohe and completed in 1964. The building is 384 feet (117 m) tall with 30 floors; it was named for U.S. Congressman Everett Dirksen. The building houses the United States Court of Appeals for the Seventh Circuit, the United States District Court for the Northern District of Illinois, the United States Bankruptcy Court, the United States Marshal for the Northern District of Illinois, United States Attorney for the Northern District of Illinois, and local offices for various court-related federal agencies, such as the Federal Public Defender, United States Probation Service, United States Trustee, and National Labor Relations Board. It is one of three buildings making up the modernist Chicago Federal Center complex designed by van der Rohe, along with Federal Plaza, the U.S. Post Office (Loop Station) and the Kluczynski Federal Building. Separate from the Federal Plaza, but opposite the Kluczynski Building across Jackson Boulevard, is the Metcalfe Federal Building.

Great Northern Hotel was a historic hotel in Chicago's Loop area. It was located at the northeast corner of Jackson Boulevard and Dearborn Street in Chicago, Illinois. The building was designed by Burnham and Root. They created a new design, with an urban office block floor plan that was free of historical or European influences. The site is now occupied by the Dirksen Federal Building.

The Chicago Federal Building in Chicago, Illinois was constructed between 1898 and 1905 for the purpose of housing the Midwest's federal courts, main post office, and other government bureaus. It stood in The Loop neighborhood on a block bounded by Dearborn, Adams and Clark Streets and Jackson Boulevard. The site held an 1880 post office, courthouse and customhouse which was cleared to make way for the new building. The 1905 building was itself demolished in 1965 and replaced with the Kluczynski Federal Building. The push for a new building was spearheaded by postmaster Washington Hesing with backing by civic leaders and Illinois's members of Congress. The explosion of Chicago's population, especially after the World's Columbian Exposition of 1893, strained the earlier facility beyond capacity. When the Exposition began, the Post Office Department in Chicago employed 998 clerks and 935 carriers. By the time Congress approved funding for a new building, the post office had expanded to 1,319 clerks and 1,096 carriers. Other agencies housed in the building complained of poor planning and shoddy construction which resulted in crumbling plaster, broken plumbing and flooding.The new building was designed in the Beaux-Arts style by architect Henry Ives Cobb. The floorplan was a six-story Greek cross atop a two-story base with a raised basement. The building was capped by a dome at the crossing that held an additional eight floors of office space in its drum for a total of 16 floors. The gilt dome extended 100 ft (30 m) above the drum.

The Chicago flood occurred on April 13, 1992, when repair work on a bridge spanning the Chicago River damaged the wall of an abandoned and disused utility tunnel beneath the river. The resulting breach flooded basements, facilities and the underground Chicago Pedway throughout the Chicago Loop with an estimated 250 million US gallons (1,000,000 m3) of water. The remediation lasted for weeks, and cost about $2 billion in 1992 dollars, equivalent to $3.86 billion in 2021. The legal battles lasted for several years, and disagreement over who was at fault persists to this day.

The Center for Research in Security Prices (CRSP) is a provider of historical stock market data. The Center is a part of the Booth School of Business at the University of Chicago. CRSP maintains some of the largest and most comprehensive proprietary historical databases in stock market research. Academic researchers and investment professionals rely on CRSP for accurate, survivor bias-free information which provides a foundation for their research and analyses. As of 2020, CRSP claims over 500 clients. The name is usually pronounced "crisp". CRSP was founded in 1960 by James H. Lorie (professor of finance and director of research) and Lawrence Fisher (assistant professor of finance) of the University of Chicago, with a grant from Merrill Lynch, Pierce, Fenner & Smith. Its goal was to provide a source of accurate and comprehensive data that could be used to answer basic questions about the behavior of stock markets. The first effort of the Center was the production of a database consisting of monthly stock prices on the New York Stock Exchange for all common stocks from 1926 to 1962. Dividends, shares outstanding, capital changes, and delisting information was also included. Taken together, this data made possible the first comprehensive study of the rates of return on common stocks. Since then the database has been kept up to date to the present day, daily data has been expanded back to 1926, and other exchanges and financial instruments have been added. On January 1, 2020, CRSP spun off from Chicago Booth and became CRSP, LLC. CRSP, LLC is an affiliate of the University of Chicago Booth School of Business. CRSP's flagship databases include: Common stocks on the NYSE from 1926, AMEX from 1962, and NASDAQ from 1972 CRSP Indexes NASDAQ and S&P 500 Composite Indices NASDAQ and AMEX Industry Indices US Treasury bonds Survivor bias-free mutual funds Market capitalization reports; Proxy graphs for 10-K SEC filings Other custom datasetsIn partnership with Compustat, CRSP provides the CRSP/Compustat Merged Database, and in partnership with the Ziman School of Real Estate at UCLA's Anderson School of Business, the CRSP/Ziman REIT Data Series.

The Clark Adams Building, also known as the Bankers Building, is a skyscraper located at 105 West Adams Street in Chicago, Illinois. The building was designed by the Burnham Brothers who designed other buildings in Chicago such as the Carbide and Carbon Building. The building stands at 476 feet tall and has 41 floors. Construction of the Clark Adams Building began in 1926 and was completed in 1927.