Article 2 of the Treaty on European Union (TEU) solemnly proclaims that the EU is founded on the respect for human dignity, freedom, democracy, equality, the rule of law and respect for human rights. Yet, a growing body of case law concerning rule of law backsliding continuously reminds us of the lack of a dedicated functional mechanism to remedy this. We are left with a fragmented understanding of the founding values and a patchy framework for their enforcement: whilst there is increasing guidance on judicial independence and the rule of law, no founding value has been defined comprehensively. The legal classification of the founding values is equally unclear, as is their position in the EU’s constitutional framework. This paper makes do with what we have, to offer systematic, normative, and substantive clarifications on Article 2 TEU. Systematically, it places the founding values in the constitutional context of the EU’s and Member States’ legal orders and discusses their autonomy, interpretation, and function. Normatively, this paper objects to the direct enforcement of the founding values by reference to their constitutional significance and over-constitutionalization. Substantively, it favors the indirect enforcement of the founding values and explores the connections between Article 2 TEU and other Treaty provisions.