That question is impossible to answer. It would total billions over history.
The Plague killed thousands of people in the medieval Europe.
Many fled to Western Europe.
There are 7 microstates in Europe.
The social structure of western Europe is quite interesting. Western Europe is a very social place to be with many forms of communication happening.
Western Europe has many bays, harbors, and peninsulas.
The people who lived in Eastern Europe were largely, if not completely, cut off from the Western world. They also did not have many of the basic freedoms we take for granted.
Western Europe has many countries, each with their own government. You may be thinking of the European Union, but this is not a government and not all countries in western Europe are members of the European Union.
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All of Europe is a peninsula of peninsulas. This is because Europe is a peninsula itself, and contains many, many peninsulas.
Many came from western Europe, from when they were expelled during the inquisition.
Europe usually has four or five regions: Western Europe, Southern Europe, Eastern Europe, Northern Europe, and sometimes Central Europe.
There are many cultures in Europe, or in any country in Europe, much too many to name. But the most common, generic cultures would be identified in the regions of Europe. Scandinavia, Western Europe, Southern Europe, Central Europe, and Eastern Europe. Most of these cultures are drastically different. For example take Western and Eastern Europe. Western Europe's culture is modernized, technological, urban, etc. while Eastern Europe's still remains agricultural, less advanced, native, etc.