Duchess Alexandra Petrovna of Oldenburg

Grand Duchess Alexandra Petrovna of Russia was a daughter of Duke Peter Georgievich of Oldenburg and a great granddaughter of Emperor Paul I of Russia. She married Grand Duke Nicholas Nikolaevich of Russia , the elder, and was the mother of Grand Duke Nicholas Nikolaevich of Russia , the younger. After the breakup of her marriage, she retired from court life and eventually became a nun.

Alexandra Petrovna was born onJune 1838, in St. Petersburg as Duchess Alexandra Frederika Wilhelmina of Oldenburg. She was the eldest of the eight children of Duke Peter Georgievich of Oldenburg and his wife Princess Therese of NassauWeilburg, halfsister of Sofia of Nassau, queen consort of Oscar II of Sweden. Alexandra belonged to a German family but grew up in Russia, where her family was closely related to the Romanov dynasty.

Source: Wikipedia