Yes. In fact it should always be capitalized.
Yes It Is Supposed To Be Capital
Yes, European should always be capitalized.
Yes, Eurozone should be capitalized as it refers to the group of European Union countries that have adopted the euro as their official currency.
Yes, it should be capitalized.
Proper nouns (e.g. names of specific countries, cities, events, or historical periods) and the pronoun "I" are typically capitalized in European culture. Adjectives derived from proper nouns (e.g. European, French) are also capitalized when referring to specific types of culture or people.
Yes, the word "European" should be capitalized when referring to people or things from Europe.
...European powers... European is the adjective, modifying the word powers; but it should be capitalized.
No, 'era' should not be capitalized unless it is at the beginning of a sentence or part of a proper noun (e.g., Victorian Era).
If you mean the European Union, then yes it is capitalised. European is also capitalised.
Yes, it is proper to capitalize the word "European" when referring to people, languages, or things related to Europe. However, when used in a general sense or as an adjective, it does not need to be capitalized (e.g., European culture vs. a European country).
Have should be capitalized if it is the beginning of a sentence. Summer should not be capitalized.
It should only be capitalized if it forms part of a title.
Yes, it should be capitalized.