Career
He also served from 1785 to 1803 as the last Lutheran Prince-Bishop of Lübeck, until that Prince-Bishopric was secularized and joined to Oldenburg. Peter Frederick Louis was born on 17 January 1755 at Riesenburg. He was the only surviving son of Prince Georg Ludwig of Holstein-Gottorp and Sophie Charlotte of Schleswig-Holstein-Sonderburg-Beck.
From 1785 until 1803, he also served as the last Lutheran Prince-Bishop of Lübeck, until that Prince-Bishopric was secularized as the Principality of Lübeck and joined to Oldenburg.
Following the death of Wilhelm in 1823, he himself became reigning Duke of Oldenburg. Although the Duchy of Oldenburg had been elevated to a Grand Duchy in 1815, he refrained from using the title of Grand Duke.
Peter I died on 21 May 1829 in Wiesbaden. He was buried in the Ducal Mausoleum in the Churchyard of Saint Gertrude in Oldenburg.
Ancestry Issue.