First preliminary reference of the German Federal Constitutional Court – ECB Outright Monetary Transaction Programme (OMT) – Financial crisis – Ultra vires review – Principle of democracy – Judicial dialogue – Separation of powers – National constitutional identity – Mandate of the ECB – Article 123 TFEU – Article 18.1 ESCB-Statute – Economic and monetary policy – Honeywell test partially abandoned – Pringle judgment inverted – No margin of discretion for the ECB – Necessity, and prohibition of functional misuse, under Article 267 TFEU – Comparative reasoning