When were Peter III and Catherine the Great married?
Catherine the Great
2 May 1729 – 21 August 1745: Her Serene Highness Princess Sophie of Anhalt-Zerbst
21 August 1745 – 5 January 1762: Her Imperial Highness Grand Duchess Catherine Alekseievna of Russia
5 January 1762 – 9 July 1762: Her Imperial Majesty The Empress of All the Russias (as Empress consort)
9 July 1762 – 17 November 1796: Her Imperial Majesty The Empress and Autocrat of All the Russias (as Empress Regnant)