John Hancock Center in the context of "Fernsehturm Berlin"

The Fourth Presbyterian Church of Chicago is one of the largest congregations of the Presbyterian Church (U.S.A.), the largest in the Presbytery of Chicago, located in the Magnificent Mile neighborhood of Chicago, directly across Michigan Avenue from the John Hancock Center.

In structural engineering, the tube is a system where, to resist lateral loads (wind, seismic, impact), a building is designed to act like a hollow cylinder, cantilevered perpendicular to the ground. This system was introduced by Fazlur Rahman Khan while at the architectural firm Skidmore, Owings & Merrill (SOM), in their Chicago office. The first example of the tube's use is the 43-story Khan-designed DeWitt-Chestnut Apartment Building, since renamed Plaza on DeWitt, in Chicago, Illinois, finished in 1966.

The system can be built using steel, concrete, or composite construction (the discrete use of both steel and concrete). It can be used for office, apartment, and mixed-use buildings. Most buildings of over 40 stories built since the 1960s are of this structural type.

SOM, an initialism of its original name Skidmore, Owings & Merrill LLP, is a Chicago-based architectural, urban planning, and engineering firm. It was founded in 1936 by Louis Skidmore and Nathaniel Owings. In 1939, they were joined by engineer John O. Merrill. The firm opened its second office, in New York City, in 1937 and has since expanded, with offices in San Francisco, Los Angeles, Washington, D.C., London, Melbourne, Hong Kong, Shanghai, Seattle, and Dubai.

Notable for its role as a pioneer of modernist architecture in America and for its groundbreaking work in skyscraper design and construction, SOM has designed some of the world's most significant architectural and urban projects including several of the tallest buildings in the world: John Hancock Center (1969, second tallest in the world when built), Willis Tower (1973, tallest in the world for almost twenty-five years), One World Trade Center (2014, currently the seventh tallest in the world), and Burj Khalifa (2010, currently the world's tallest building). The firm's notable current work includes the new headquarters for the Walt Disney Company, the global headquarters for Citigroup, Moynihan Train Hall and the expanded Penn Station complex, and the restoration and renovation of the Waldorf Astoria in New York City; airport projects at O'Hare International Airport, Kansas City International Airport, and Kempegowda International Airport; urban master plans for the Charenton-Bercy district in Paris, New Covent Garden in London, Treasure Island in San Francisco, the East Riverfront in Detroit; P.S. 62, the first net-zero-energy school in New York City; and the design of the Moon Village, a concept for the first permanent lunar settlement, developed with the European Space Agency and Massachusetts Institute of Technology.