<P> 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 1970s , and the seventh building , 7 World Trade Center , was constructed in the mid-1980s . </P>
<P> 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 1970s , and the seventh building , 7 World Trade Center , was constructed in the mid-1980s . </P>
when was the world trade center originally built
when was the world trade center originally built
August 1968
August 1968