NEW YORK, NY.- Christie’s announces further details of its upcoming auction of Important American Paintings, Drawings and Sculpture on 18 May 2011, at 10 am. A total of 138 lots will be offered, featuring outstanding works drawn from a cross-section of styles and genres, including Hudson River School, American Impressionism, Regionalism, Modernism, and Western Art. The sale is expected to achieve in excess of $29 million total.