Peter III of Russia
Empress Elizabeth arranged for Peter to marry his second cousin, Sophia Augusta Frederica (later Catherine the Great), daughter of Christian August, Prince of Anhalt-Zerbst and Johanna Elisabeth of Holstein-Gottorp. The young princess formally converted to Russian Orthodoxy and took the name Ekaterina Alexeievna (i.e., Catherine). They married on 21 August 1745. The marriage was not a happy one but produced one son, the future Emperor Paul, and one daughter, Anna Petrovna (20 December 1757 – 19 March 1759). Catherine later claimed that Paul was not fathered by Peter: that, in fact, they had never consummated the marriage. During the sixteen years of their residence in Oranienbaum, Catherine took numerous lovers, while her husband did the same in the beginning.
Catherine the Great
Though Catherine's life and reign included remarkable personal successes, they ended with two failures. Her Swedish cousin (once removed), King Gustav IV Adolph, visited her in September 1796, the Empress's intention being that her granddaughter Alexandra should become Queen of Sweden by marriage. A ball was given at the imperial court on 11 September, when the engagement was supposed to be announced. Gustav Adolph felt pressured to accept the fact that Alexandra would not be converting to Lutheranism, and though he was delighted by the young lady, he refused to appear at the ball and left for Stockholm. Catherine was so irritated at this, her health was affected. She recovered well enough to begin to plan a ceremony where a favourite grandson would supersede her difficult son on the throne, but she died of a stroke before the announcement could be made, just over two months after the engagement ball.