The
North Tower (also known as
Tower 1,
Building One, or
1 WTC) was one of the twin towers of the original
World Trade Center in
New York City. It was completed in 1972, standing at a height of , and was the
tallest building in the world until being surpassed by the
Sears Tower in
Chicago in 1973. It was distinguishable from its twin, the
South Tower, by the
telecommunications antenna on its roof. Including the antenna, the building stood at a total height of . The building's address was
1 World Trade Center, with the WTC complex having its own
ZIP code of
10048. The North Tower and its twin were both destroyed in the
terrorist attacks of September 11, 2001; the North Tower was the first of the towers to be struck by
a hijacked aircraft, at 8:46 a.m
EDT, and it collapsed at 10:28 a.m. Of the 2,977 victims killed in the attacks, 1,402 were in or above the North Tower impact zone. The North Tower was replaced by the present-day
One World Trade Center tower, which was opened in November 2014 as the lead building of the redeveloped World Trade Center site.