… luxembourg city has an area of 51.73 km2, making up about 2% of the nation's territory. it … luxembourg city has an area of 51.73 km2, making up about 2% of the nation's territory. it … area of 51.73 km2 (2% of the country's territory), 136,208 … luxembourg city has an area of 51.73 km2, making up about 2% of the nation's territory. it …