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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.
The first store building to be erected in the new town was Hancock's Store, a general store opened in July 1871, by William Smith. The adobe structure was built on the northwest corner of First and Washington streets and served as the town hall, county offices and general meeting place of early Phoenix.