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
History of the Netherlands 1831, and in 1833 an armistice of indefinite duration was concluded. Belgium was effectively independent but William's attempts to recover Luxembourg and Limburg led to renewed tension. The London Conference of 1838–39 prepared the final Dutch-Belgian separation treaty of 1839. It divided Luxembourg and Limburg between the Dutch and Belgian crowns. The Kingdom of the Netherlands thereafter was made up of the 11 northern provinces. The Netherlands did not industrialize as rapidly as Belgium after 1830, but it was prosperous enough. Griffiths argues that certain government policies facilitated the emergence of a national economy in the 19th century. They included