COVID-19 and other recent crises have proved the need to review the state-of-play and implement robust institutional frameworks in the complex, heterogenous and decentralised European supervisory architecture. This insightful book outlines what can be done to innovate the current set-up in the face of pressing issues such as climate change, BigTech and crypto assets. Revisiting the debate on financial sector oversight in Europe, a range of highly acclaimed international academics and influential policymakers discuss the scope of institutional arrangements. Chapters examine how the architecture of European financial supervision currently works, analysing the trends in banking supervision design and the influence that recent financial and economic crises have exerted. Providing a rare insight into the role that central banks play in the supervisory set-up, their accountability and democratic legitimacy, the book also considers the ways that macro- and micro-prudential and monetary policies interact. Gleaning lessons from the FinTech revolution and the COVID-19 crisis, the book ultimately concludes by seeking a path for optimal architecture for European financial supervision. With invaluable industry insights, this cutting-edge book will prove vital to academics in the field of financial economics and financial regulation, alongside policymakers looking to transform their current supervisory architecture.