Prince Friedrich Wilhelm of Hesse-Kassel was a German nobleman born on March 20, 1820. He belonged to the House of Hesse and was the son of William I, Landgrave of Hesse-Kassel and Princess Mary of Great Britain. Friedrich Wilhelm served in the military and held various positions within the German states during the 19th century. He is best known for his role in the political landscape of Germany during a time of significant change. Friedrich Wilhelm was involved in the unification efforts of the German states and was a supporter of the German Empire, which was established in 1871. He passed away on January 14, 1884.