It's an unusual case, but Jack Johnson (1878-1946), the controversial boxer who was the first African-American world heavyweight champion, is buried in an unmarked grave here in Chicago's Graceland Cemetery. There is a plot marker with the last name "Johnson" and a stone for his wife Etta, but the family decided not to mark Jack Johnson's own grave. They were worried about possible vandalism or desecration because of the racial hatred he encountered during his life.