For Wednesday's Geo Quiz we're looking for the city in the state of Baden-Wurttemburg, close to the border with France.
The city was founded in 1715 around its beautiful palace.
It is a carefully, and beautifully, planned city. In fact, there's speculation that it served as an inspiration for the layout of Washington, DC.
Washington's planner Pierre Charles L'Enfant was given the plans for our German city before he began work on the new US capital.
One last clue from the news on Wednesday: This city now serves as the seat of Germany's Supreme Court. The city was chosen so the judicial branch wouldn't be too close to other seats of German political power – like Berlin and Frankfurt.
And today, many in Europe were watching the German Federal Constitutional Court, as it handed down a ruling that may give Europe's ailing economies some hope.
The answer is Karlsruhe, Germany.
Anchor Marco Werman speaks with The World's Clark Boyd about what the German Constitutional Court's ruling means for Europe's embattled single currency.