This book questions whether and how European spatial planning is becoming institutionalised. Since the first steps towards creating spatial planning at the European level were taken some twenty years ago, it seems appropriate to look back at what has been achieved over this period. Notable achievements have been the adoption of the European Spatial Development Perspective (ESDP) in 1999 and the Territorial Agenda of the European Union in 2007. The main analysis covers the period between these two key achievements. The book examines the extent to which the European spatial planning agenda has become embedded in policy-making, in particular in ongoing discussions about the future of EU territorial cohesion policy. In so doing, it gives a roadmap for European spatial planning.