Princess Mary of Great Britain Princess Mary of Great Britain Princess Mary of Great Britain (5 March 1723 – 14 January 1772) was the second-youngest daughter of King George II of Great Britain and his wife Caroline of Ansbach, and Landgravine of Hesse-Kassel as the wife of Landgrave Frederick II. Princess Mary was born at Leicester House, Westminster, London. Her father was the Prince of Wales, later King George II. Her mother was Caroline of Ansbach, daughter of Johann Friedrich, Margrave of Brandenburg-Ansbach. Her father succeeded, as George II, on 11 June 1727, and she became "HRH The Princess Mary". Upon her death in 1737,
Princess Frederica Caroline of Saxe-Coburg-Saalfeld her husband found her ugly, ignorant and boring. The marriage remained childless, he separated from his wife, who by that time lived at Schwaningen Castle in Unterschwaningen, and began to live with his mistress Elizabeth Craven. Frederica Caroline's brother, Prince Josias of Saxe-Coburg-Saalfeld, owed his sister admission to the regiment as captain, this starting point of his brilliant career military. After Frederica Caroline's death, her husband abdicated as Margrave and sold the Margravate to Prussia, he left the country and married his English mistress that year. Frederica Caroline is buried in the Gumbertuskirche in Ansbach. Princess Frederica Caroline of Saxe-Coburg-Saalfeld