Overview
Princess Milica Petrović-Njegoš of Montenegro, also known as Grand Duchess Militza Nikolaevna of Russia, (14 July 1866 – 5 September 1951) was a Montenegrin princess. She was the daughter of King Nikola I Petrović-Njegoš of Montenegro and Milena Vukotić. Milica was the wife of Grand Duke Peter Nikolaevich of Russia, the younger brother of Grand Duke Nicholas Nikolaevich of Russia, whose wife was Milica's sister, Anastasia.
Life
Milica and her sister, Anastasia, were invited by Alexander III of Russia to be educated at the Russian Smolny Institute, which was a school for "noble maids".
Grand Duke Peter Nikolaevich of Russia and Princess Milica were married on 26 July 1889 in Saint Petersburg. She was the first princess to marry in to the Imperial family who was already an Orthodox and did not need to convert in order to marry. She was described as well educated, intelligent and arrogant, and the opposite of her introverted spouse. Milica was an honorary doctor on alchemy in Paris.
From Wikipedia (CC BY-SA 4.0).