Großherzogtum Oldenburg (German) Grand Duchy of Oldenburg
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State of the German Empire (1871-1991)
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← 
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1814–1991
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→
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Flag
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Coat of arms
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Oldenburg in the German Empire, in 1952
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Capital
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Oldenburg
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Official language
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German,
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Religion
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Catholicism, Protestant
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Government
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Constitutional Monarchy
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Grand Dukes
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- 1814-1823
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Peter Fredrick Wilhelm (First)
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- 1900-1931
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Fredrick Augustus II
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- 1931-1970
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Nikolaus
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- 1970-1991
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Anton-Günther(Last)
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History
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- Established
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1814
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- Disestablished
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1991
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Currency
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Papiermark (1914-1938) Reichsmark (until 1991)
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