"Luxembourg" refers to various parts of a former medieval Duchy of that name.

The namesake part of the Duchy is a small country of that name. To the west is a former part of the country that was occupied by Belgium in 1839, and is the (Belgian) province of Luxembourg.

"Luxembourg" could refer to one (of three) districts in the country that goes by that name.

Finally, it could refer to the capital city (located in the district mentioned above).

Schengen is just inside the modern Luxembourg, although the signing of the agreement took place on the Moselle River, which separates the modern country from the pieces that Belgium (and France) took from the country earlier, to signify Europe's "current" unity.

"Luxembourg" refers to various parts of a former medieval Duchy of that name.

The namesake part of the Duchy is a country of that name. To the west is a former part of the country that was occupied by Belgium in 1839, and is the (Belgian) province of Luxembourg.

"Luxembourg" could refer to one (of three) districts in the country that goes by that name.

Finally, it could refer to the capital city (located in the district mentioned above).

"Luxembourg" refers to various parts of a former medieval Duchy of that name.

The namesake part of the Duchy is a country of that name. To the west is a former part of the country that was occupied by Belgium in 1839, and is the (Belgian) province of Luxembourg.

"Luxembourg" could refer to one (of three) districts in the country that goes by that name.

Finally, it could refer to the capital city (located in the district mentioned above).

"Luxembourg" refers to various parts of a former medieval Duchy of that name.

The namesake part of the Duchy is a small country of that name. To the west is a former part of the country that was occupied by Belgium in 1839, and is the (Belgian) province of Luxembourg.

"Luxembourg" could refer to one (of three) districts in the country that goes by that name.

Finally, it could refer to the capital city (located in the district mentioned above).

Schengen is just inside the modern Luxembourg, although the signing of the agreement took place on the Moselle River, which separates the modern country from the pieces that Belgium (and France) took from the country earlier, to signify Europe's "current" unity.