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Timeline. 1  1965: Plans for the John Hancock Center are announced. 2  1969: Construction is completed. 3  1972: The Hancock Center is surpassed by the Standard Oil Building (now the Aon Center) as the tallest building in Chicago.  1973: The residential portion of this building converts from apartments to condominiums.
Construction. Construction started in 1792 and in 1800, when the building was almost completed, president John Adams moved in. Ever since, each President of the United States has lived in the White House.