This volume provides a comprehensive overview of the inherent tensions, weaknesses, and strengths of the European Union as a political, legal, economic, and social actor in times of ground-breaking disruption. structured into 7 thematic parts, with 35 chapters in total, brought together by an introductory chapter: Part I explores the impact of the COVID-19 crisis on EU institutional law, focusing primarily on the cha- llenges posed by the pandemic to the core principles of solidarity and rule of law, as well as to the functioning of EU institutions, agencies, and bodies. Part II is devoted to COVID-19 legal challenges in the ?eld of democracy and human rights, with a particular emphasis on migration and data protection issues. Part III assesses the EU?s legal response to the pande- mic in the area of health and risk regulation, tackling, inter alia, the role of the precautionary principle in times of scienti?c uncertainty and several issues rela- ting to the legal framework on vaccines. Part IV addresses the delicate legal implications of the ongoing crisis in the ?eld of banking, ?nance, and euro governance. Part V deals with internal market law and the pro- found alterations it is being subjected to in a context of massive pandemic-induced restrictions to free move- ment, mostly (but not only) concerning the free move- ment of persons. Part VI explores the role performed by, and the cha- llenges posed to, EU competition and State aid law during the COVID-19 pandemic. Part VII provides an overview of the main legal impli- cations of the ongoing crisis for the functioning of the EU judiciary, conceived as the ultimate guarantor of the rule of law ? a function of paramount importance, especially in times of truly large-scale restrictions of rights and of unprecedented disruptions of the pre- established legal framework.