<P> The original World Trade Center was a large complex of seven buildings in Lower Manhattan , New York City , United States . It featured the landmark twin towers , which opened on April 4 , 1973 , and were destroyed in 2001 during the September 11 attacks . At the time of their completion , the `` Twin Towers '' -- the original 1 World Trade Center , at 1,368 feet ( 417 m ) ; and 2 World Trade Center , at 1,362 feet ( 415.1 m ) -- were the tallest buildings in the world . Other buildings in the complex included the Marriott World Trade Center ( 3 WTC ) , 4 WTC , 5 WTC , 6 WTC , and 7 WTC . All were built between 1975 and 1985 , with a cost of $400 million ( $2,300,000,000 in 2014 dollars ) . The complex was located in New York City 's Financial District and contained 13,400,000 square feet ( 1,240,000 m ) of office space . </P>
<P> The original World Trade Center was a large complex of seven buildings in Lower Manhattan , New York City , United States . It featured the landmark twin towers , which opened on April 4 , 1973 , and were destroyed in 2001 during the September 11 attacks . At the time of their completion , the `` Twin Towers '' -- the original 1 World Trade Center , at 1,368 feet ( 417 m ) ; and 2 World Trade Center , at 1,362 feet ( 415.1 m ) -- were the tallest buildings in the world . Other buildings in the complex included the Marriott World Trade Center ( 3 WTC ) , 4 WTC , 5 WTC , 6 WTC , and 7 WTC . All were built between 1975 and 1985 , with a cost of $400 million ( $2,300,000,000 in 2014 dollars ) . The complex was located in New York City 's Financial District and contained 13,400,000 square feet ( 1,240,000 m ) of office space . </P>
how many square feet were the twin towers
how many square feet were the twin towers
1 World Trade Center , at 1,368 feet ( 417 m ) 2 World Trade Center , at 1,362 feet ( 415.1 m )
1 World Trade Center , at 1,368 feet ( 417 m ) 2 World Trade Center , at 1,362 feet ( 415.1 m )