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
The choice of Sophie as wife of her second cousin, the prospective tsar Peter of Holstein-Gottorp, resulted from some amount of diplomatic management in which Count Lestocq, Peter's aunt (and ruling Russian Empress) Elizabeth and Frederick II of Prussia took part. Lestocq and Frederick wanted to strengthen the friendship between Prussia and Russia to weaken Austria's influence and ruin the Russian chancellor Bestuzhev, on whom Empress Elizabeth relied, and who acted as a known partisan of Russo-Austrian co-operation. Catherine first met Peter III at the age of 10. Based on her writings, she found Peter detestable upon meeting him. She disliked his pale complexion and his fondness for alcohol at such a young age. Peter also still played with toy soldiers. Catherine later wrote that she stayed at one end of the castle, and Peter at the other.