Brief history of 360 Chicago
1965: The building that houses the observation deck was originally conceived to be the second tallest building in the world.
1967: Construction of the tower was interrupted because of a flaw that was discovered in an innovative engineering method used to pour concrete in stages.
1969: After an engineering problem and a credit crunch, the building was finally completed. Its first resident, Ray Heckla, was the original building engineer.
1999: Originally known as the John Hancock Observatory, the 360-degree observatory has won various awards for its distinctive style, including the Distinguished Architects Twenty-five Year Award from the American Institute of Architects.
2012: A Paris-based company Montparnasse 56 Group purchased the John Hancock Observatory.