Revolutions of 1848 in the German states
The Revolutions in the German states developed in most of the 38 states of Germany that were loosely bound together in the German Confederation after the Congress of Vienna in 1815. To these states belonged Austria as well though Hungary that was part of the Austrian-Hungarian Empire was not part of the German Confederation.
But it was in Berlin too where the Prussian king Frederick William refused to become emperor of a united German state. Austria and Prussia withdrew their delegates from the Assembly, and the Assembly itself slowly disintegrated afterwards.