Ludwig’s Square can be found in Old Saarbrücken. At its center stands impressively the beautiful Baroque Ludwig’s Church, one of the city’s most recognisable landmarks and one of the most important Protestant churches in Germany. Ludwig’s Square is surrounded by the Saarland state chancellery and lovely, meticulously restored civil servant’s houses. Together, they form a unique architectural ensemble, completed in 1775 by master builder Friedrich Joachim Stengel.
Turning from Schmollerstraße into Brentanostraße to access Rothenbergstraße, you basically drive right through a building. The passage (Brentanostraße) was dug through a so-called high bunker, i.e. a bunker in which the volume of the protected space is entirely or mainly above the level of the earth's surface.