KnowraDuchy of PrussiaLinked fromLinked fromThe 9 pages that link to Duchy of Prussia, each with the reason it gives.All 9Broader topic 3Related 2Narrower topic 2Compared with 2Kingdom of PrussiaNarrower topic: Its electorate’s sovereignty outside the Holy Roman Empire enabled Frederick III to crown himself king in Prussia.Albert Frederick, Duke of PrussiaNarrower topic: Albert Frederick inherited this state in 1568 and ruled it until his death.