Oldenburg
Oldenburg was a county of the Holy Roman Empire on the lower Weser, centred on Oldenburg. In 1337 it was ruled by Count Johan of the House of Oldenburg.
In 1448 Count Christian became king of Denmark and left Oldenburg to his brothers. Anton I introduced the Reformation and reunited Delmenhorst in 1547. Anton Günther kept the county out of the Thirty Years' War by armed neutrality; his heirless death in 1667 brought Danish rule. The 1773 Treaty of Tsarskoye Selo transferred Oldenburg to Holstein-Gottorp, and in 1774 it became a duchy.
Characters
- Christian IV, Count of Oldenburg
- Elisabeth of Brunswick-Lüneburg
- John II, Count of Oldenburg
- John III, Count of Oldenburg
- John IV, Count of Oldenburg
- Conrad I, Count of Oldenburg
- Mechthild von Bronckhorst