Topic
Duchy of Oldenburg.
historical duchy centred on Oldenburg in what is now north-western Germany
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About Duchy of Oldenburg
The Duchy of Oldenburg, named for its capital, the town of Oldenburg, was a state in the north-west of present-day Germany.
Everything about Duchy of Oldenburg →- Country
- Holy Roman Empire, Confederation of the Rhine
- Inception
- 1774