The president of the Rehearsal Club came into royalty because of his marriage to which person?
Prince Christian of Schleswig-Holstein Prince Christian of Schleswig-Holstein (Frederick Christian Charles Augustus; 22 January 1831 – 28 October 1917) was a minor Danish-born German prince who became a member of the British Royal Family through his marriage to Princess Helena of the United Kingdom (25 May 1846 – 9 June 1923), the fifth child and third daughter of Queen Victoria and Prince Albert of Saxe-Coburg-Gotha.
Catherine the Great Catherine II (Russian: Екатерина Алексеевна "Yekaterina Alekseyevna"; 2 May [O.S. 21 April] 1729 – 17 November [O.S. 6 November] 1796 ), also known as Catherine the Great (Екатери́на Вели́кая , "Yekaterina Velikaya"), born Princess Sophie of Anhalt-Zerbst, was Empress of Russia from 1762 until 1796, the country's longest-ruling female leader and arguably its most renowned, regardless of gender (although Peter the Great was the only Tsar officially designated as "The Great" ). She came to power following a "coup d'état" when her husband, Peter III, was assassinated. Russia was revitalised under her reign, growing larger as well as stronger in military terms and becoming recognised as one of the great powers of Europe.