Luxembourg becomes a Grand Duchy by the Congress of Vienna.
Luxembourg is granted political autonomy by King William I.
Luxembourg's independence is recognized.
WWI begins, and Luxembourg is occupied by German forces until the end of the war.
Luxembourg joins the League of Nations.
Luxembourg and Belgium join in an economic union, in which both countries use Belgium's currency.
Luxembourg is once more occupied by Germany until 1944.
The economic union with Belgium expands to now include the Netherlands.
Luxembourg joins NATO.
Luxembourg becomes a founding member of the European Economic Community, which goes into effect the next year.
Luxembourg enters a period of economic recession.
The Maastricht Treaty, which creates the EU, is adopted by Luxembourg.
The Euro becomes the national currency.
Voters approve a new EU constitution.