Luxembourg an independent state under the personal possession of William I of the Netherlands with a Prussian garrison to guard the city against another invasion from France. In 1839, following the turmoil of the Belgian Revolution, the purely Oil-speaking part of Luxembourg was ceded to Belgium and the Luxembourgish-speaking part (except the Arelerland, the area around Arlon) became what is the present state of Luxembourg. Luxembourg is a founding member of the European Union, OECD, United Nations, NATO, and Benelux. The city of Luxembourg, which is the country's capital and largest city, is the seat of several institutions and agencies of
Habsburg Netherlands on. In 1581, the Seven United Provinces seceded to form the Dutch Republic; the remaining Spanish Southern Netherlands eventually passed on to Habsburg Austria. Finally, the Austrian Netherlands were annexed by the French First Republic in 1795, becoming the French client state of the Batavian Republic. The Habsburg Netherlands was a geo-political entity covering the whole of the Low Countries (i.e. the present-day Netherlands, Belgium, Luxembourg, and French Nord-Pas-de-Calais) from 1482 to 1581. Already under the rule of the Burgundian duke Philip the Good (1419–1467), the provinces of the Netherlands began to grow together: Flanders, Artois and Mechelen, Namur, Holland,