András Sajó is one of the most distinguished scholars in the field of comparative constitutional law. The present volume is a collection of studies written in his honour by distinguished scholars from many countries.Constitutional democracies evolve and this evolution is speeding up. As a result, constitutional law is undergoing a rapid and substantial evolution. One of the main developments is the ongoing process of its Europeanization and internationalization. This book aims to present and explain these recent transformations. It gives a comprehensive overview of issues that arise in the context of the Europeanization and internationalization of constitutional law. It will be of interest not only to scholars and students in law and political science but to all persons who are interested in the developments of constitutional democracies.