This study investigates a benchmark for comparing central banks. The author employs a unique and large set of metrics to gauge the quality of central banks and presents an argument to reflect upon international best practice. The study uses different criteria including the accounting body, research, presence of stress-testing exercises, inflation-targeting frameworks, staff efficiency, and languages of communication with the public, amongst others. The book begins by providing an overview of central banking, before exploring some stylized facts about central banks in detail. It then presents a ratings methodology for worldwide central banks before analysing the results. A backtesting exercise is included to validate the quality of the ratings obtained. The book concludes by offering insights into the comparison of central banks.