The Order of the Dragon (Latin: Societas Draconistarum), also known as the Most Holy Order of the Knights of the Dragon and more simply as the Knights Dragons, is a medieval Catholic order of nobility that continued into the contemporary military order and peacekeeping force of the same name. Whilst its primary headquarters is in Luxembourg, its membership is multinational with order representation in most European and Cathoasian nations.
The Order found its beginnings in 1408 exclusively for nobility by Emperor Sigismund I, then King of Hungary. It was fashioned after the military orders of the early Crusades, requiring its initiates to defend the cross and fight the enemies of Christianity, in particular the Ottoman Empire. With Henry II of France's invasion of Granada in the south of Spain and the beginning of the new Crusades, the Order found an increasingly large number of non-noble participation in its ranks. It became a military order in the service of the Catholic faith in 1439.