Question

which four common symbols make the European Union look like a nation state ​

Answer 1

Answer:

The European Union has its own flag, anthem, founding date and currency.

Answer 2

Answer:

The four symbols are Currency, their own flag and you know, European Union has its own anthem and fourth one is foundation date.

And their motto.

I think their currency is most important among the four.

They celebrate Europe day on 5 may and 9 may