La reconstruction post-conflit de l’Etat est un enjeu majeur et actuel des relations internationales. L’Union européenne, sous les auspices des Nations Unies contribue à restaurer ou instaurer un ordre étatique qui doit donner sa chance à une paix durable fondée sur des valeurs respectueuses des droits de l’homme. Toutefois, l’Union européenne reste maitre de ses interventions. Il n’existe pas véritablement pour les Etats post-conflits un droit à la reconstruction. Un complexe d’acteurs institutionnels européens décide et organise la réponse européenne à la déliquescence des Etats au sortir des conflits. Cette réponse n’est pas isolée, elle s’inscrit dans un ensemble de partenariats.L’organisation régionale déploie un ensemble de mécanismes juridiques ou opérationnels, militaires ou civils de gestion du relèvement des Etats en sortie de conflit. L’engagement européen peut prendre des formes très intrusives, et s’apparente parfois à une tutelle européenne sur des Etats victimes de conflits. Au final, l’Union européenne participe à la définition et à la réalisation d’un droit international de la reconstruction de l’Etat. Elle consacre des normes et des standards internationaux. Elle inaugure des normes et des standards européens adaptées au relèvement des Etats. De ce point de vue, l’offre européenne en matière de reconstruction post conflit de l’Etat est globale. C'est-à-dire que l’Europe propose de reconstruire l’Etat sous ses trois composantes traditionnelles : la population, le territoire et l’appareil d’Etat. / In the framework of International Relations, Post Conflict Reconstruction of the State is a major and actual stake. European Union under the auspices of United Nations, supports all initiatives to restore or build a state order which give a chance for a stable peace based on human values. Nevertheless, European Union defines his interventions in function of his own interests. Post-conflicts States don’t have a right to reconstruction. A mix of european institutional actors decide and design the european response dedicated to failed Post-conflict States. This response is not isolated, she is included in a network of parternship.After a conflict, the regional organization set up a mix of legal or operational mechanisms, and military or civilian capacities. The european activism in this domain can be very strong. Sometimes, it seems as a trusteeship of EU on Post conflicts States. Consequently, European Union contributes to design and implement the international law of the State reconstruction. EU promotes norms and international standards. It initiates european norms and standards dedicated to the recovery of states. Consequently, European Union possess global capacities in the matter of post-conflict reconstruction. That is to say that Europe is proposing to rebuild the state in its three traditional components: population, territory and state apparatus.

Le phénomène du religieux joue un rôle important en Europe. Le droit ecclésiastique stipule les rapports juridiques entre l’Etat et les Eglises et les Religions. L’article 9 CEDH et son développement jurisprudentiel créent les conditions d’existence d’un droit ecclésiastique européen de facto. En outre, la Déclaration 11 annexée au Traité d’Amsterdam, la Charte des Droits fondamentaux de l’Union et le Traité de Lisbonne forment les fondements d’un droit ecclésiastique de l’Union, dans la perspective d’une convergence plus avancée. La contribution de l’Eglise Orthodoxe à la construction européenne est considérée indispensable par le biais des Représentations des Eglises Orthodoxes localement établies au sein de l’Union Européenne, ainsi que de sa tradition ecclésiale. / The religious phenomenon plays an important role in Europe. The ecclesiastical law regulates the relationship between the State and the Churches/Religions. The article 9 of the ECHR and its jurisprudential development create conditions for the existence of a de facto European ecclesiastical law. In addition, the Declaration 11 annexed to the Amsterdam Treaty, the Charter of Fundamental Rights of the European Union and the Lisbon Treaty are the foundations of an Ecclesiastical law of the Union from the perspective of a more advanced convergence. The contribution of the Orthodox Church to the European construction is considered indispensable through representations of the locally established Orthodox Churches, within the European Union and its ecclesiastical tradition. / Το θρησκευτικό φαινόμενο παίζει ένα σημαντικό ρόλο στην Ευρώπη. Το εκκλησιαστικό δίκαιο ρυθμίζει τις σχέσεις Εκκλησιών και Θρησκειών με το κράτος. Το άρθρο 9 ΕΣΔΑ και η νομολογιακή του ανάπτυξη δημιουργούν τις δομές ύπαρξης ενός ευρωπαϊκού εκκλησιαστικού δικαίου de facto. Από την άλλη, η Δήλωση 11 της Συνθήκης του Άμστερνταμ, ο Χάρτης Θεμελιωδών δικαιωμάτων και η Συνθήκη της Λισσαβόνας διαμορφώνουν τα θεμέλια ενός Εκκλησιαστικού δικαίου της Ένωσης, υπό τη προοπτική μίας πιο προχωρημένης σύγκλησης. Η συνεισφορά της Ορθόδοξης Εκκλησίας στην οικοδομή της Ευρώπης θεωρείται απαραίτητη μέσω των αντιπροσωπειών των κατά τόπους Ορθόδοξων Εκκλησιών στην Ευρωπαϊκή Ένωση αλλά και μέσω της εκκλησιαστική της παράδοση.

This thesis addresses the question as to why multilevel politics is becoming an integral part of politics in Europe. Multilevel politics is conceptualized as a system which functions through a complex web of political relations within and across levels of decision making. The thesis argues that the rise of multilevel politics can be explained by its institutionalization in terms of the emergence, the evolution and especially the effects of relevant institutions. Based on a mixed-method research project, the influence of European institutions on subnational actors and the alignment of actor motives with institutional characteristics are empirically shown. The first chapter of the dissertation establishes the centrality of institutions for political transformation, examines the role of transnational and domestic institutions for multilevel politics, and contextualizes the research question in terms of institution-actor relations. The second chapter develops a new-institutionalist theoretical framework that explains the emergence, the evolution and the effects of the institutions, and formulates a series of hypotheses with regard to freestanding institutional influence, power distribution, material benefits and political identification. The third chapter outlines the mixed-method research design which addresses individual-level and institutional-level variations through a Europe-wide survey and a comparative case study. The fourth chapter on survey results shows generally favourable views on multilevel politics, and strong associations of these views with the independent variables under scrutiny. The fifth chapter specifies a multivariate model which includes all posited variables and confirms the majority of the hypotheses. Therefore, the new-institutionalist argument is broadly confirmed, while there is relatively weak evidence to sustain sociological explanations. The final chapter compares the Committee of the Regions and the Congress of Local and Regional Authorities, and examines the institutional characteristics which correspond to the hypothesized variables. It is then concluded that the two institutions share several overarching similarities, and display complementarity in other aspects.