Kerry James Marshall: The Histories at the Royal Academy of Arts in London is the largest ever European retrospective of the work of the US artist and has been greeted with universal critical acclaim. In the distance is the back of the Sainsbury WingThe Art NewspaperLast week, the National Gallery in London announced that it will build a major new extension, at a cost around £400m, of which £375m has already been raised. Project Domani, as it is called, is billed by the gallery as the largest transformation since it was founded, 200 years ago. The gallery will also expand its collecting boundary beyond 1900 in a major shift in the division of UK national collections. The Art Newspaper’s digital editor, Alexander Morrison, talks to the director of the National Gallery, Gabriele Finaldi.