World Trade Center was a large complex of seven buildings in Lower Manhattan , New York City , United States . It opened on April 4 , 1973 , and was destroyed in 2001 during the September 11 attacks . At the time of their completion , the Twin Towers — the original 1 World Trade Center , at ; and 2 World Trade Center , at — 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 . The complex was located in New York City 's Financial District and contained of office space
September 11 attacks
September 11 attacks
World Trade Center (1973–2001)