| William I | |||||
|---|---|---|---|---|---|
| Duke of Oldenburg | |||||
| Duke of Oldenburg | |||||
| Predecessor | Frederick Augustus I | ||||
| Successor | Peter I | ||||
| Born |
3 January 1754 Eutin |
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| Died | 2 July 1823 (aged 69) Schloss Plön, Plön |
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| House | House of Holstein-Gottorp | ||||
| Father | Frederick August I, Duke of Oldenburg | ||||
| Mother | Princess Ulrike Friederike Wilhelmine of Hesse-Kassel | ||||
| Full name | |
|---|---|
| German: Peter Friedrich Wilhelm |
Peter Friedrich Wilhelm, Duke of Oldenburg, (3 January 1754, Eutin Castle, Eutin – 2 July 1823, Schloss Plön, Plön.) Wilhelm succeeded his father,Frederick Augustus I, Duke of Oldenburg as the Duke of Oldenburg in 1785. Wilhelm's mother was Princess Ulrike Friederike Wilhelmine of Hesse-Kassel.
Due to mental illness, Wilhelm was duke in name only, with his cousin Peter, Prince-Bishop of Lübeck, acting as regent throughout his entire reign.
The title became a Grand Duke in 1815, but Wilhelm never used the elevated style. It was not used until 1829 by the son of Wilhelm's cousin and successor, Peter I.