William IV of Hesse was a German prince born on May 24, 1792. He was the Landgrave of Hesse-Kassel from 1831 until his death in 1836. William IV was known for his efforts to modernize his territory and improve the welfare of his subjects. During his reign, he focused on economic development and education, promoting infrastructure projects and supporting the arts. His leadership contributed to the stability of Hesse-Kassel, making it a significant region in Germany during the early 19th century. William IV passed away on November 17, 1836, leaving a legacy of progress in his principality.