Grand Duke Louis IV was the ruler of the Grand Duchy of Hesse from 1830 until his death in 1892. He was born on June 9, 1830, and was a member of the House of Hesse. Louis IV is known for his efforts to modernize the Grand Duchy, promoting economic development and education during his reign. He was also a significant figure in the political landscape of Germany, supporting the unification movement. Louis IV was married to Princess Alice of the United Kingdom, the second daughter of Queen Victoria, which strengthened ties between the British and Hesse royal families.