Instantly Access Production Data Subscribe now to receive immediate access to. oil and gas production for NGL Water Solutions Permian, LLC. from April 2014 to October 2017.
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.
For the tower in Chicago, see John Hancock Center. For other buildings in Boston named Hancock, see John Hancock Building. 200 Clarendon Street, (previously John Hancock Tower) and colloquially known as The Hancock, is a 60-story, 790-foot (240 m) skyscraper in Boston. The tower was designed by Henry N. Cobb of the firm I. M. Pei & Partners and was completed in 1976.