Luxembourg Visa
Officially known as the Grand Duchy of Luxembourg, this nation, despite being one of the smallest countries in Europe and the least populous, has quite the reputation. It is one of the 4 official capitals of the EU, as well as the founding members of the EU, OECD, NATO, and the UN. Be it tourism, business, work, or whatever the purpose, you will need a Luxembourg visa to enter the country. Apart from this, the seat of the European Court of Justice is situated in Luxembourg as well.