DULUTH — Jean Birkenstein Washington was simply called "Jean" by everyone, including her children. "One time I said, 'Mommy ... I mean, Jean,'" remembered her son Robin Washington. "She said, 'You can call me Mommy.' I said, 'No, you're Jean.'" Jean (1926-2003) would have turned 100 this year, and the centennial is being marked by exhibits of her paintings both in Duluth and in her home city of Chicago.