Wilhelm IX, Landgrave of Hesse-Cassel, later Elector Wilhelm I, his wife, Wilhelmine Caroline and their children, Wilhelm, Friederika and Caroline
Artist: Wilhelm Böttner (German, 1752-1805)
Collection: Royal Collection Trust, London, United Kingdom
William IX was George III's first cousin - his mother was Princess Mary (1723-72), the sister of George III's father, Frederick, Prince of Wales. He inherited the title Landgrave of Hesse-Cassel upon the death of this father in 1785 and was subsequently in 1803 granted the title of Elector of Hesse. One of the richest princes in Europe, his employment of Mayer Amschel Rothschild (1744-1812) as 'Court Factor' effectively launched the fortunes of that family. Wilhelm also built in 1785 a new range of palace buildings and an English landscape garden to the Wilhelmsöhe Park in the hills above Kassel.
Böttner shows the Landgrave with his wife, Wilhelmine Caroline (1747-1820), whom he married in 1764, and their three surviving children, Wilhelm (1777-1847), Friederika (1768-1839), and Caroline (1771-1848). The family are relaxing in Wilhelmshöhe Park, with the block at the end of the new range of palace buildings, presumably under construction, visible behind them.