The House of Schleswig-Holstein is a historical royal family from the region of Schleswig-Holstein in northern Germany. It originated in the Middle Ages and became prominent in European politics, particularly during the 19th century. The house is known for its connections to various European monarchies, including the Danish and British royal families. The family played a significant role in the Schleswig Wars, which were conflicts over the territories of Schleswig and Holstein. The Duke of Schleswig-Holstein title has been held by various members of the house, influencing the region's governance and its relationship with neighboring countries.