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Selection of an heir

As an unmarried and childless empress, it was imperative for Elizabeth to find a legitimate heir to secure the Romanov dynasty. She chose her nephew, Peter of Holstein-Gottorp. The young Peter had lost his mother shortly after he was born, and his father at the age of eleven. Elizabeth invited her young nephew to Saint Petersburg, where he was received into the Russian Orthodox Church and proclaimed the heir to the throne on 7 November 1742. Keen to see the dynasty secured, Elizabeth immediately gave Peter the best Russian tutors and settled on Princess Sophie of Anhalt-Zerbst as a bride for her heir. Incidentally, Sophie's mother, Joanna Elisabeth of Holstein-Gottorp, was a sister of Elizabeth's own fiancé, who had died before the wedding. On her conversion to the Russian Orthodox Church, Sophie was given the name Catherine in memory of Elizabeth's mother. The marriage took place on 21 August 1745. Nine years later a son, the future Paul I, was born on 20 September 1754.

There is considerable speculation as to the actual paternity of Paul. It is suggested that he was not Peter's son at all but that his mother had engaged in an affair, to which Elizabeth had consented, with a young officer, Sergei Vasilievich Saltykov, who would have been Paul's biological father. Peter never gave any indication that he believed Paul to have been fathered by anyone but himself but took no interest in parenthood. Elizabeth most certainly took an active interest and acted as if she were his mother, instead of Catherine. Shortly after Paul's birth the Empress ordered the midwife to take the baby and to follow her, and Catherine did not see her child for another month, for a short churching ceremony. Six months later, Elizabeth let Catherine see the child again. The child had, in effect, become a ward of the state and, in a larger sense, the property of the state.