The first 20 years of the European Central Bank (ECB) offer a clear demonstration of how a central bank can navigate macroeconomic insecurity and crisis. As the coronavirus pandemic moves the global economy into a new phase of unheralded uncertainty, the story of the ECB holds multiple lessons of wider significance for the central banking community and researchers of monetary policy. This volume provides a unique account of how the ECB has reacted to the challenges confronting the euro area through its monetary policy, turning to innovative measures and unprecedented policy actions to fend off the various threats posed by the global financial turmoil of 2007/08, the euro area sovereign debt market crisis, and the subsequent period of anaemic growth and deflationary pressures.