A Map of Art History
The most recent issue of Drawing Magazine has published "The Flowering Staircase: 1435-1935," a genealogical chart of artists from Michelangelo to Thomas Eakins and Robert Henri. Somehow they bothered to list Norman Rockwell and Howard Pyle (illustrators), while Picasso is palpably omitted. Obvious biases aside, it has some value for the student of art history.
(Here's the link to the author of the Staircase.)