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.
Prince Paul of Württemberg
Shortly before his marriage, Paul had a mistress, an actress named Friederike Margrethe Porth (22 August 1776, Halberstadt - 9 June 1860, Frankfurt am Main). Friederike was the daughter of Johann Carl Porth (1748, Barchwitz, Silesia - 18 June 1794, Weimar) and his wife Caroline (c. 1752 - died after 1797, Weimar).