Princess Anastasia of Montenegro

Princess Anastasia Petrović-Njegoš of Montenegro was the daughter of King Nikola I Petrović-Njegoš of Montenegro (1841–1921) and his wife, Queen Milena (1847–1923). Through her second marriage, she became Grand Duchess Anastasia Nikolaevna Romanova of Russia. She and her sister "Militza", having married Russian royal brothers, were known colloquially as the "Montenegrin princesses" or the "Black peril" during the last days of Imperial Russia, and may have contributed to its downfall by the introduction of Grigori Rasputin to the Empress Alexandra.