Peter I or Peter Frederick Louis of Holstein-Gottorp was the Regent of the Duchy of Oldenburg for his incapacitated cousin William I from 1785 to 1823, and then served himself as Duke from 1823 to 1829.
- Occupation
- land owner, politician, art collector, Lutheran pastor
- Position held
- Grand Duke, prince elector of Lübeck, bishop
- Citizenship
- Grand Duchy of Oldenburg
- Born
- January 17, 1755, 1755
- Died
- May 21, 1829, 1829