<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 first world trade center built
when was the first world trade center built
Construction of the World Trade Center 's North Tower began in August 1968
Construction of the World Trade Center 's North Tower began in August 1968