The House of Schleswig is a noble family from the region of Schleswig, which is now part of modern-day Germany and Denmark. It has historical significance, particularly during the Middle Ages, when it played a key role in the politics of Northern Europe. The house is known for its connections to various royal families and its influence over the duchies of Schleswig and Holstein. Members of the House of Schleswig have held various titles, including kings and dukes. The family is often associated with the Schleswig-Holstein Question, a political dispute in the 19th century that involved the territories of Schleswig and Holstein and their relationship with Denmark and Germany.