The John Hancock Tower at 200 Clarendon Street in Boston's Back Bay was designed by Henry N. Cobb of I.M. Pei & Partners for John Hancock Mutual Life Insurance Company. Construction began in 1968 and ended in 1976. The article gives no formal style, describing it as minimalist with a parallelogram plan.
The 60-story steel frame is 790 feet (241 m) high and sheathed in blue reflective glass, with a notch in each short side. Window panes fell, and the original 10,344 panes were replaced. About 1,500 tons of diagonal bracing and a tuned mass damper on the 58th floor were added to control sway.
Excavation retaining walls failed and damaged nearby property, including Trinity Church. Boston Properties bought the tower in 2010, and it was renamed 200 Clarendon in 2015. The observation deck closed after September 11, 2001, and the article does not say whether it reopened.
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