Abstract

The paper analyses the relevant issue of the relationship of international law and European Union law. Therefore, independent systems of law exist, which inevitably arise the issue of relationship and interaction of these systems. Legal literature analyses the question of the relationship of these two systems of law on the basis of various aspects. The author has chosen the following structure of the paper: first, the general problem of the relationship of international and European Union law is discussed. While describing the problem, the nature of the European Union and international law, as well as the distinguishing features of these systems of law, is analysed. The paper also provides a discussion about the decisions of the Strasbourg court and the Court of Justice of the European Union, which provide the basis of solving the problem of the relationship of these systems of law. In the second part of this paper, the main theories are analysed: the monistic, dualistic and coordination theories, which can be used to answer the issue of interaction of the two systems of law – international law and European Union law