Founded in 963, Luxembourg became a grand duchy in 1815 and an independent state under the Netherlands. It lost more than half of its territory to Belgium in 1839, but gained a larger measure of autonomy. Full independence was attained in 1867. Overrun by Germany in both World Wars, it ended its neutrality in 1948 when it entered into the Benelux Customs Union and when it joined NATO the following year. In 1957, Luxembourg became one of the six founding countries of the European Economic Community (later the European Union), and in 1999 it joined the euro currency area.
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The topography of the country is divided very clearly between the hilly
Oesling of the northern third of the Grand Duchy and the flat
Gutland, which occupies the southern two-thirds. The country's longest river is the
Sauer, which is a tributary of the
Moselle, the basin of which includes almost all of Luxembourg's area. Other major rivers include the
Alzette in the south and the
Wiltz in the north.
The
capital, and by far the largest city, is
Luxembourg City, which is located in the Gutland, as are most of the country's main population centres, including
Esch-sur-Alzette,
Dudelange, and
Differdange. Besides Luxembourg City, the other main towns are primarily located in the southern
Red Lands region, which lines the border between Luxembourg and France to the south.