September 27, 1971: A construction worker retrieved the fir tree after it was hoisted with the last girder in traditional topping-off ceremonies at the John Hancock Tower. The white-colored beam hoisted to the top and representing the final piece of structural steel to go into the construction of the building carried with it the American flag as well as the fir tree and signatures of many home office employees,  tree and signatures of many home office employees, construction workers and dignitaries. The 790-foot-high tower was now officially New England's tallest structure.