The purpose of this article is to discuss the type of attachment and allegiance propounded in the recently proclaimed Charter of Fundamental Rights of the European Union. Charters such as Bills of Rights are generally held to be reflective of and evocative of a rights-based constitutional patriotism. The EU is not a state; there are widely different conceptions of what it is and should be, one of which is the vision of a Europe of nation states. Is the spirit of (...) the Charter thus instead that of deep diversity, i.e. reflective of a wide diversity of views, visions and values as to what the EU is and ought to be? The article contrasts constitutional patriotism and deep diversity as alternative underlying philosophies of the Charter and also briefly examines the Charter's presumed ability to produce either type of sentiment of allegiance. (shrink)