<P> During its twelfth session , in December 1988 , the World Heritage Committee ( WHC ) selected parts of Timbuktu 's historic centre for inscription on its World Heritage list . The selection was based on three criteria : </P>
<P> During its twelfth session , in December 1988 , the World Heritage Committee ( WHC ) selected parts of Timbuktu 's historic centre for inscription on its World Heritage list . The selection was based on three criteria : </P>
when did timbuktu become a world heritage site
when did timbuktu become a world heritage site
in December 1988
in December 1988