William IV, Landgrave of Hesse-Kassel was a German nobleman born on May 24, 1792. He was the son of William I, Landgrave of Hesse-Kassel and Princess Mary of Great Britain. William IV ruled from 1831 until his death in 1836, overseeing a period of modernization and reform in his territory. During his reign, William IV focused on improving the economy and infrastructure of Hesse-Kassel. He was known for his support of education and the arts, which contributed to the cultural development of the region. His leadership helped shape the future of Hesse-Kassel in the 19th century.