when was the twin towers built in new york
World Trade Center (1973–2001) 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 as a result of the September 11 attacks in 2001. 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. The other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. All these buildings were built between 1975 and 1985, with a construction cost of $400 million ($2,300,000,000 in 2014 dollars).[4] The complex was located in New York City's Financial District and contained 13,400,000 square feet (1,240,000 m2) of office space.[5][6]
Marriott World Trade Center The Marriott World Trade Center was a 22-story[1] steel-framed hotel building with 825 rooms. It opened in July 1981 as the Vista International Hotel and was located at 3 World Trade Center in Manhattan, New York City, with the World Trade Center complex having its own zip code of 10048. The hotel no longer operates and was destroyed beyond repair as a result of the terrorist attacks of September 11, 2001, after the collapse of the Twin Towers. The hotel will not be replaced as part of the new World Trade Center complex, but will rather share its name with the new office tower.