Orange-Nassau (also named Nassau-Orange) (German: Oranien-Nassau or Nassau-Oranien) was a principality which was part of the Lower Rhenish-Westphalian Circle within the Holy Roman Empire. It existed under this name between 1702 and 1815. The territory of the former state of Orange-Nassau is now part of Germany. It was ruled by the House of Orange-Nassau. In 1815 the prince became the new King of the Netherlands and Grand Duke of Luxembourg with the name William I of the Netherlands. To this day the Netherlands is ruled by the members of the House of Orange-Nassau.