The alter ego (or egos) of Hank Gerrard the "Not-Cardinal" Tojman, and the man responsible for the mysterious picture game currently being played in the Currier 1st floor common room.
Also, the original designer of the Wikipedia logo. Yes, Paul is the one responsable for that jigsaw-puzzle globe that stares back at you when you look up something on Wikipedia... More than everything you need to know about the process is at [1].