Timeplots.com has created a beautiful poster/webpage which diagrams the history of the U.S. Supreme Court, including all of its justices, who appointed them, when they served, and landmark decisions. It is viewable here. A snapshot of part of it is below.
This is part of a three-part project which also includes wonderful diagrams of the histories of the U.S. Senate and the Presidency.
Ernster, the Virtual Library Cat