The history of Luxembourg begins with earlier Celtic, Roman and medieval settlements, but the medieval castle founded at Lucilinburhuc in 963 became the basis of the later county of Luxembourg. The county was raised to a duchy in 1354. Members of the House of Luxembourg became kings of Bohemia and Holy Roman Emperors, giving the territory political influence far beyond its size. Luxembourg's fortress also made the town a strategic military centre and earned it the name “Gibraltar of the North.” The territory changed hands among the Burgundian, Habsburg, Spanish, French and Austrian spheres. The treaties of 1659, 1815 and 1839 successively reduced and reshaped Luxembourg's territory. In 1815, Luxembourg became a grand duchy and entered a personal union with the Netherlands. The 1839 settlement established much of the present territorial form and separated Luxembourg from the Belgian province that had previously formed part of the grand duchy. The personal union ended in 1890 when Luxembourg's succession passed to the House of Nassau-Weilburg. Luxembourg was occupied by Germany during both World Wars. The Second World War strengthened support for closer cooperation with neighbouring states after the country's sovereignty had been violated. After 1945, Luxembourg became a founding participant in European integration and hosted major European institutions. Economic change, immigration and the continued use of Luxembourgish, French and German have also shaped modern society. Historical knowledge comes from written records, maps, buildings, archaeological evidence, photographs, oral accounts and administrative archives. The Archives nationales de Luxembourg, municipal collections, museums and local historical societies preserve different parts of this record. Sources can disagree because they were created by different governments, communities or observers. Comparing their date, purpose, language and perspective helps distinguish documented events from later interpretations.
History in Luxembourg
Luxembourg's history reflects its position between larger powers in Western Europe. The territory developed from a medieval county into a duchy and later into an independent state whose borders were shaped by several treaties and partitions. Its fortress, multilingual society, occupations and role in European integration remain central to understanding Luxembourg today.
Tip
Use Luxembourg's history as a framework for understanding how territory, political power, military strategy and European cooperation shaped present-day society. Start with the period and place relevant to your question, then compare more than one type of source before treating an interpretation as settled. Keep earlier territorial arrangements separate from Luxembourg's current borders.

