Louis I, Grand Duke of Hesse
In 1776, he became engaged to Sophie Dorothea of Württemberg, eldest daughter of Frederick II Eugene, Duke of Württemberg. The engagement was broken off so that Sophia Dorothea could marry Louis's recently widowed brother-in-law Tsarevich Paul Petrovich, son and heir of Catherine II "the Great", Empress of Russia. He received a monetary compensation when the engagement was broken.
Sophie, Duchess of Hohenberg
Sophie and Franz Ferdinand were married on 1 July 1900 at Reichstadt (now Zákupy) in Bohemia. The Emperor did not attend the nuptials, nor did any of the archdukes, including Franz Ferdinand's brothers. The only members of the Imperial family who were present were Franz Ferdinand's stepmother, Archduchess Maria Theresa, and her two daughters.
Upon her marriage, Sophie was given the title "Fürstin von Hohenberg" ("Princess of Hohenberg") with the style of "Durchlaucht" ("Serene Highness"). In 1909, she was elevated to "Herzogin" (Duchess) and accorded the higher style of "Hoheit" ("Highness").