Martin Luther stands at the intersection of times and disciplines: His theology significantly shaped the Reformation, which marks the beginning of the modern coexistence of confessions. His Bible translation promoted the spread of the Saxon chancery language throughout Germany, thereby influencing the development of modern High German. His hymns mark the beginning of the rich tradition of Protestant church music. Cranach and Dürer are artists who owe essential impulses to the new Protestant worldview. The planned encyclopedia will address this multifaceted personality in numerous articles written by specialists and will also consider the historical context and aftermath: a standard work for all those who, within the framework of the Luther Decade, seek not only solid information but also wish to embark on an exciting journey of discovery.