Barbara Piasecka Johnson, whose rags-to-riches tale - an immigrant maid marries a multimillionaire and inherits all of his money, fending off the furious claims of his children - was at the center of what one writer called "the largest, costliest, ugliest, most spectacular and most conspicuous" probate battle in American history, died on Monday near Wroclaw, Poland, where she spent much of her childhood. She was 76.