In this situation, making the Eurosystem a central bank requires drawing the appropriate distinction between being national in the organisational sense and being euro area-wide in the definition of the public interest pursued. This is a difficult distinction to draw in conceptual terms, not only in practical terms or from the point of view of personal attitudes.
In the articulation of any federal constitution (Bund, Land and local, to use the German terminology) the central bank undoubtedly belongs to the level of the "federation", or Bund. The fact that important activities are conducted by "local" components of the system (Landeszentralbanken, or Federal Reserve District Banks) is an organisational feature that does not impinge upon the constitutional position of the central bank. The same happens within Monetary Union. The Eurosystem is the central bank of the euro area, even though operations are carried out - to the extent possible and appropriate - through its component parts, the NCBs. Indeed, the constitutional and the organisational profile of the institution are not in contradiction.