Ah, whoops. wolfwood already posted this while I was writing the othуr part of the reply.
With the Battle of Kyiv over, and Russian forces rapidly retreating, Ukrainians are finding civilian corpses all over the streets and roads of the towns of bucha, Irpin, Hostomel all across Kyiv Oblast. Many of the corpses have had their hands tied behind their backs and shot in the backs of their heads. Only in Bucha the mayor confirms 280 dead. Not yet at Srebrenica, but already out of Vukovar.
Fucking hell. Curse you, bald dwarf.
Yeah I know, what I'm talking is that me thinks that Könisberg and by extension East Prussia (or at least it's northen portion) were never under the control of the Polish-Lithuanian Commonwealth. So the previous de facto and de jure owner would be Germany.
My understanding is that a fief is like a protectorate, but I'm by no means an expert in feudal system structure.
It's a bit complicated. Teutonic or Monastic Prussia fell in decline after the battle of Gruenwald and other wars with Poland and Lithuania in XVth century. It lead to creation of Royal Prussia and Ducal Prussia. Royal Prussia was a proper province of the Polish Kingdom and then Commonwealth. Ducal Prussia was a fief of the Duke of Prussia (previously Teutonic Grand Master), which became the basis of the first Protestant State in Europe, part of the personal union with Brandenburg, and then became Kingdom of Prussia, and then German Empire.
Speaking of the region,