This article argues that public interests fundamentally underpin the decision-making processes of the European supervisory authorities in the banking system and, through their extraordinary regulatory influence, contribute to shaping the discretionary powers, orienting them towards an adequate and effective legal protection of the individual and collective subjective spheres, whose interests are embodied in the legal sources and principles of the European legal order. The case of the European Banking Authority reflects this conceptual framework and could serve as a benchmark for European banking law.