when did the construction of the world trade center begin
Construction of the World Trade Center Construction of the World Trade Center's North Tower began in August 1968, and the South Tower in 1969. Extensive use of prefabricated components helped to speed up the construction process. The first tenants moved into the North Tower in December 1970 and into the South Tower in January 1972. Four other low-level buildings were constructed as part of the World Trade Center in the early 1970s, and the complex was mostly complete by 1973. A seventh building, 7 World Trade Center, was opened in 1987.
3 World Trade Center 3 World Trade Center (also known as 175 Greenwich Street) is a skyscraper under construction as part of the rebuilding of the World Trade Center site in Lower Manhattan, New York City. The project lies on the east side of Greenwich Street, across the street from the previous location of the Twin Towers, which were destroyed during the September 11 attacks in 2001. Pritzker Prize-winning architect Richard Rogers, of Rogers Stirk Harbour + Partners, was awarded the contract to design the building, which will have a height of 1,079 ft (329 m) with 80 stories. The building's concrete core was topped out to maximum height in August 2016, with the perimeter steel structure topped out on October 6, 2016. The building is scheduled to be completed in 2018.