One World Trade Center is an edifice.
A building or edifice is a structure with a roof and walls standing more or less permanently in one place , such as a house or factory . One World Trade Center ( also known as 1 World Trade Center , 1 WTC or Freedom Tower ) is the main building of the rebuilt World Trade Center complex in Lower Manhattan , New York City . On May 10 , 2013 , the final component of the skyscraper 's spire was installed , making the building , including its spire , reach a total height of 1776 ft. Its height in feet is a deliberate reference to the year when the United States Declaration of Independence was signed . On March 26 , 2009 , the Port Authority of New York and New Jersey ( PANYNJ ) confirmed that the building would be officially known by its legal name of `` One World Trade Center '' , rather than its colloquial name of `` Freedom Tower '' .