Mary of Great Britain (5 March 1723 – 14 January 1772) was the second-youngest daughter of George II of Great Britain and his wife, Caroline of Ansbach, and Landgravine of Hesse-Kassel as the wife of Frederick II, Landgrave of Hesse-Kassel.
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Early life
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, her mother, Queen Caroline, entrusted Mary to her elder sister Caroline, urging her to "do what she could to support the meek and mild disposition of Princess Mary".
Marriage
A marriage was negotiated with Landgrave Frederick of Hesse-Kassel, the only son and heir of William VIII, Landgrave of Hesse-Kassel. For the marriage, Parliament voted Mary £40,000.
They married by proxy at the Chapel Royal of St. James's Palace in London on 8 May, then in person on 28 June 1740 at Bellevue Palace, Kassel.