The rest of Germany thinks of Karlsruhe, when it thinks of it at all, as a placid city where the Supreme Court is situated. Nestled in the far southwest, where Germany begins to blend into France, Karlsruhe was one of the first planned cities of Europe and an oasis of the Enlightenment. When Thomas Jefferson passed through, in 1788, he sent a sketch of the street plan back home, as a possible template for the layout of Washington, D.C.