Widely known for its banking sanctuary, it is also the center of European Courts of Justice and Auditors, and is the core of the European Investment Bank. Luxembourg is a scenic city that has kept a unique elegance. Visit Luxembourg with your eyes wide open, because you will be astonished by this cultivated and exquisite city. Luxembourg was in yesteryear a strong fortress, known to be impassable. At one point, the French held the city under siege for seven months, and the durable defense system of the city caused it to earn the nickname “Gibraltar of the north” – Gibraltar was renowned in history for being one the most impenetrable fortresses that existed.