The Medici family is widely known for its prominent role in the Italian Renaissance. However, their activities as bankers and merchants have been little studied. Although it was economic power that allowed them to seize political power and monopolize business in Europe west of the Rhine. Raymond de Roover's extensive work was created on the basis of rare archival documents. It is dedicated to the Medici Bank - the most influential in 15th-century Europe - and is extremely important for understanding the economics, politics and social life of the time. It is also interesting that the history of the Medici Bank resonates with the present day and enriches our knowledge of the origins of modern business.