I don't know all the countries in Europe but I know a few big ones. I didn't know that Liechtenstein is a country though.
From the wikipedia page, Liechtenstein is the richest (by measure of GDP per capita) country in the world and the only country to lie entirely in the Alps. It is known as a principality as it is a constitutional monarchy headed by a prince. It is bordered by Switzerland to the west and south and by Austria to the east and north. Its area is just over 160 square kilometers (62 square miles), and it has an estimated population of 35,000. Its capital is Vaduz.
Liechtenstein follows a policy of neutrality and is one of the few countries in the world that maintains no military. It has a 125 employee-strong police force tasked to maintaining order within the country.