What is Wilhelm, Duke of Oldenburg?
{{Infobox royalty | name = William I | full name = {{lang-de|Peter Friedrich Wilhelm}} | image = | caption = | reign = 6 July 1785 –2 July 1823 | succession = [[Counts, dukes and grand dukes of Oldenburg |Duke of Oldenburg]] | predecessor = [[Frederick August I, Duke of Oldenburg|Frederick Augustus I]] | successor = [[Peter I, Duke of Oldenburg|Peter I]] | spouse = | issue = | house = [[Dukes of Holstein-Gottorp|House of Holstein-Gottorp]] | father = [[Frederick August I, Duke of Oldenburg]] | mother = [[Princess Ulrike Friederike Wilhelmine of Hesse-Kassel]] | birth_date = {{Birth date|1754|01|03|df=y}} | birth_place = [[Eutin]], [[Prince-bishopric of Lübeck]] | death_date = {{Death date and age|1823|07|02|1754|01|03|df=y}} | death_place = Schloss Plön, [[Plön]], [[Duchy of Holstein]] | place of burial= }} '''Peter Friedrich Wilhelm, Duke of Oldenburg''' (born 3 January 1754 at [[Eutin Castle]] in [[Eutin]], died 2 July 1823 at [[Schloss Plön]] in [[Plön (district)|Plön]]) was a Duke of Oldenburg. He succeeded his father, [[Friedrich August I, Duke of Oldenburg]] as the Duke of Oldenburg in 1785. Wilhelm's mother was Princess [[Ulrike Friederike Wilhelmine of Hesse-Kassel]]. {{s-start}} {{s-hou|[[Dukes of Holstein-Gottorp|House of Holstein-Gottorp]]|3 January|1754|2 July|1823|[[House of Oldenburg]]}} {{s-reg|}} {{succession box|title=[[List of rulers of Oldenburg|Duke of Oldenburg]]|before=[[Frederick August I, Duke of Oldenburg|Frederick Augustus I]]|after=[[Peter I, Duke of Oldenburg|Peter I]]|years=6 July 1785 &ndash; 2 July 1823}} {{s-end}} {{Dukes of Oldenburg}} [[Category:Dukes and duchesses]] [[Category:1754 births]] [[Category:1823 deaths]]