Prince Lorenz of Belgium, Archduke of Austria-Este is a member of the Belgian royal family as the husband of Princess Astrid of Belgium. He is the head of the House of Austria-Este, a cadet branch of the House of Habsburg-Lorraine; he has held this position since 1996.

Belgium is a constitutional, hereditary and popular monarchy. The monarch is titled King of the Belgians and serves as the country's head of state and commander-in-chief of the Belgian Armed Forces. There have been seven Belgian monarchs since independence in 1830.