ART

Paintings done in France before World War II and American works done after it dominate a show of 20th-Century art at Washington’s National Gallery that opened Tuesday and will remain a major feature of the museum for the next two years. The upper level of the gallery’s East Building is dominated by Picassos, while canvases painted in France by Henri Matisse, Andre Derain, Amedeo Modigliani, Georges Braque, Fernand Leger and others, capture the upper reaches of the main building. In other separate rooms: Mark Rothko, Richard Diebenkorn, Ellsworth Kelly, Jasper Johns and Robert Rauschenberg, while works by Roy Lichtenstein and Andy Warhol share a room. The installation will be kept until the end of 1990, when the National Gallery begins to celebrate its 50th anniversary.