 The respective remits of the National and Tate Galleries , which had long been contested by the two institutions , were more clearly defined in 1996 . 1900 was established as the cut @-@ off point for paintings in the National Gallery , and in 1997 more than 60 post @-@ 1900 paintings from the collection were given to the Tate on a long @-@ term loan , in return for works by Gauguin and others . However , future expansion of the National Gallery may yet see the return of 20th @-@ century paintings to its walls . 
