LONDON.- The National Portrait Gallery, has acquired American artist Alex Katz’s bold portrait of Anna Wintour, Editor in Chief of American VOGUE. The painting, which was unveiled at the Gallery in 2010, is the first painted portrait of British-born Wintour. It is also the first work by influential American artist Katz to enter the Gallery’s Collection. The portrait will be on show from 13 September to coincide with London Fashion Week. Anna has been acquired for a special net price of £125,000, purchased with help in the form of a £45,000 grant from the Art Fund, the national fundraising charity for works of art. The remainder came from the Gallery’s own acquisition funds. In this portrait Anna Wintour is depicted without her signature sunglasses against a yellow background. Completed in late 2009, Wintour visited Katz in his New York studio where he worked