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
Spanish Netherlands Spanish Netherlands Spanish Netherlands (; ; , ) was the collective name of States of the Holy Roman Empire in the Low Countries, held in personal union by the Spanish Crown (also called Habsburg Spain) from 1556 to 1714. This region comprised most of the modern states of Belgium and Luxembourg, as well as parts of northern France, southern Netherlands, and western Germany with the capital being Brussels. The Imperial fiefs of the former Burgundian Netherlands had been inherited by the Austrian House of Habsburg from the extinct House of Valois-Burgundy upon the death of Mary of Burgundy in 1482.