skos:altLabel | - Duchy
- Prussian
- duchy
- Ducal
- ducal court
- ducal
- Prussia
- East Prussia
- secularized
- Prussia's
- Ducal Prussia
- Duchy of
- Duke of Prussia
- Electoral Prussia
- German Prussian state
- Prussian fief
- ducal Prussian
- ducal era
- duke in Prussia
- duke of Prussia
- former Prussian vassal
- secular duchy
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