For the purpose of clearing up the confusion on the part of several posters:
The European Union is political/trading bloc of 27 members which can be said to have its origins in the Treaty of Rome, 1957. The court of the European Union is called the European Court of Justice (there is also a smaller 'General Court').
The Council of Europe is older, being formed in 1949. It has 47 members, including all the EU members but also others such as Russia, Turkey, the Balkan non EU countries, Iceland.. essentially all bar Belarus, Kazhakstan (which are dictatorships) and the Vatican (a theocracy), these, with others, having observer status. Its court, which is charged with implementing the European Convention on Human Rights (ECHR), is called the European Court of Human Rights. It is not to be confused with the European Council or the Council of the European Union, which are both EU bodies.
The Council of Europe and the ECtHR have nothing to do with the European Union (despite an overlap of membership).
Ireland is a member of both.
Any other confusions surrounding the EU or Council of Europe, whether within or between each, might usefully be addressed on this thread.