Which beautiful map is that?Baltic Crusader run. Ended earlier than the date on picture, but wanted to see what will happen with revolutions. It spawned in my territory but went on spreading to Austria and bankrupting them. After several years it disappeared without much impact on me.
Also Austria, even though they are allied to me, did grow into that size entirely themselves. Only first 3 reforms, the rest was behind heretic princes wall of negative IA.