NEW YORK — Christie’s is proud to announce that Emanuel Leutze’s Washington Crossing the Delaware, a painting of transcendent historical impact, will be a highlight of the 20th Century Evening Sale taking place live on May 12 at Rockefeller Center. It is estimated at $15 million-$20 million. The painting hung for decades in the White House and is one of two extant versions by Leutze; the other version is the centerpiece of the American Wing at the Metropolitan Museum of Art.