Vienna's tiny Neue Galerie was bright last week with crude, cheery pictures of U.S. farm life, New York State style. The paintings were the work of 89-year-old "Primitive" Grandma Moses, making her first appearance before a European audience. Judging by her reception in Vienna, Grandma Moses' grand tour through The Hague, Berne, and Paris will be something of a triumph.
"At last," exclaimed one young gallerygoer on opening day, "a happy world!" An old lady peered through her lorgnette and cried: "Wonderful. She paints because she must paint just as birds sing because they...