William IV of Nassau was a prominent figure in the 19th century, known for his role as the Grand Duke of Luxembourg from 1840 until his death in 1849. He was born on December 24, 1792, and was a member of the House of Nassau. His reign was marked by efforts to modernize the Grand Duchy and improve its infrastructure. In addition to his duties in Luxembourg, William IV was also involved in the politics of the German Confederation. He was a supporter of constitutional reforms and worked to balance the interests of various political factions during a time of significant change in Europe.