Original: From 1969-1978, this record was held by the John Hancock Center, whose antenna reached a height of 1,500 ft (457.2 m), or 49 ft (14.8 m) taller than the Sears Tower's original height of 1,451 ft (442 m).
Simplified: It has 108 levels, and from the ground to the roof it is 442 m (1,451 ft) tall. From the ground to the top of the taller antenna is 527 m (1,730 ft).