They are Brussels, Belgium, and Luxembourg,Luxembourg(country.)
No. There have been many cases of non-capitals being cultural capitals of the EU. An example is Liverpool, UK In 2008
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EU doesn't have capital, it has 3 political cities: Brussels Luxembourg Strasbourg
Barcelona is one of Spain's major cities and as Spain is a member of the EU, Barcelona's currency is the Euro.
If you are EU citizen from one country to another EU country, you pay tax, which vary from one EU country to another.
yes although it is in two continents
Bulgaria is the country with a capital of Budapest. It is one of the largest cities in the EU and in Eastern Europe.
As a member of the EU, the UK is expected to issue health and safety regulations that implement EU health and safety Directives. Every member of the EU is expected to do that. No two members does it in precisely the same way. So the EU health and safety regulations are harmonized with EU directives, but may differ in subtle ways for the health and safety regulations of other EU members.
Pretty Sure There is none
Sofia is the capital city of Bulgaria. Countries, not cities, join the European Union. Bulgaria joined in 2007.
Africa
Denmark and the United Kingdom