The aim of the paper is to analyze the state of the art of macroprudential policies (MAP) with a focus on the case of the European Union. To this end the institutional framework of MAP is introduced and discussed with regard to several issues: the relationships and/or the conflicts with other policies and among the different institutional bodies involved, their mandate, accountability and governance. The operative framework -intermediate and final targets and toolkit -is specifically analyzed with regard to the case of the European Union and the introduction, in 2011, of a macroprudential supervisory pillar based on the European Systemic Risk Board (ESRB). Finally the main features of the new European supervisory architecture are addressed: the organization of MAP within the Single Supervisory Mechanisms (SSM), the definition of the role of the European Central Bank (ECB) and of the ESRB as far as macroprudential policy is concerned. In the conclusions, we evaluate the new architecture which is quite complex and cumbersome, and the challenge that the SSM is facing: to achieve comprehensive, rational, effective and efficient supervision, avoiding overlapping of competences and clarifying the specific roles of different bodies while keeping away additional burdens for the institutions supervised.