Estonia is a country in Europe, but not Southern Europe.
Most likely Portugal.
No, Denmark is not an island, but it is a European country.
Greece is a country in Southern Europe with many islands. such as crete, & ETC.
The largest country in Southern Europe in terms of area is Spain. In terms of population, the answer is Italy.
The southernmost country in Eastern Europe is Cyprus.
The third largest Southern European country is Italy.
Switzerland
Switzerland
Helsinki is located in the southern tip of Finland, a country in Northern Europe.
The Mediterranean is the most influential sea in Southern Europe.
Southern Europe is almost fully composed of democracies (most of which are republics along with two constitutional monarchies). However, there is one country in Europe that is considered a theocracy or absolute monarchy: Vatican City.