Is it farther or further?
European state, from Germanic lutilla "little" + burg "fort, castle." Related: Luxembourgeois; Luxembourger. Hence also lushburg (mid-14c.), Middle English word for "a base coin made in imitation of the sterling or silver penny and imported from Luxemburg in the reign of Edward III" [OED].
Note: Luxembourg has been a member of NATO since 1949.
Note: It was occupied by Germany during parts of World War I and World War II.
Note: Part of the Battle of the Bulge was fought in northern Luxembourg in the winter of 1944–1945.
Note: It is an international financial center and one of Europe's oldest and smallest independent countries.