The monograph examines the external regional policy of the European Union (European interregionalism), namely the EU policy regarding regional constructions in various parts of the world. The relationship between regional organizations and the construction of regions are relevant processes of the modern world order. An important place is given to modern theoretical approaches to the study of European interregionalism, interregional relations, and transregionalism. The book can be useful and interesting for specialists in the field of international relations, regional studies of political science, as well as for everyone who follows modern international processes.