St. Petersburg in 1905, Marianne also gained two siblings, children of her stepfather's first marriage, whom she had not previously known: a step-sister, Grand Duchess Maria Pavlovna of Russia, and a step-brother, Grand Duke Dimitri Pavlovich of Russia. Grand Duchess Maria Pavlovna became a Princess of Sweden and wrote a series of well-received memoirs. Grand Duke Dmitri was an excellent horseman who participated in the 1912 Stockholm Olympics and later, along with Marianne, became a suspect in Rasputin's murder. While Marianne attended school, her mother gave birth to two more daughters: Irina Pavlovna Romanovskaya-Paleya (1903–1990) and Natalia Hohenfelsen, Countess von Hohenfelsen (1905–1981). Both girls went on to become fashion models in the 1920s, and Natalia Paley later became a Hollywood movie star. Between 1905 and the time of Rasputin's murder in 1916, Princess Olga Paley worked hard to make the court of Grand Duke Paul a popular rival to that of the Tsar. The family entertained many important figures in St. Petersburg society, and the house thus became a center of court intrigue. According to Gen. Alexander Spiridovich, chief of the Tsar's Secret Personal Police, it was this rivalry between the competing salons of St. Petersburg that eventually resulted in the monk Gregory Rasputin being introduced to the Imperial Family. Rasputin arrived at St. Petersburg in 1907, won admirers, and was adopted in 1908 by Anna Vyrubova, a close friend of the Tsarina. Marriages Marianne's older brother, Alexander Erikovich von Pistohlkors, was married to Alexandra Taneyeva, the sister of the Tsarina's lady in waiting, Anna Vyrubova. Alexander and his wife were thus drawn into Rasputin's circle of supporters, and their conversation at family gatherings strongly affected the opinions of Princess Olga and Grand Duke Paul. According to Burke's Peerage, Marianne herself married three times: firstly in 1908 to Lt. Col. Peter Petrovich Durnovo, the son of the Tsar's chief of secret police, P.N. Durnovo, and a classmate of Marianne's older brother Alexander; secondly in 1912 to Christopher von Derfelden, another of Alexander's classmates in the Horse Guard; and thirdly, on 30 October 1917, to Count Nicholas Constantinovich von Zarnekau, a cornette in the Horse Guard and the son of Duke Constantine Petrovich of Oldenburg. Murder of Rasputin During World War I, when things began going badly on the Russian Front, the newspapers accused Rasputin of exercising a dark and malevolent influence over the Tsar and Tsarina. Considering it their duty