The Oera Linda Chronicle is a controversial manuscript that traces the history of the Frisian people from the deep past to the Middle Ages. Presented as a translation from ancient Frisian, the Chronicle describes various elements of ancient European culture, religion, and historical events, blending mythology with historical accounts. Of particular interest is the sinking of "Atland" into the North Sea. Due to its controversial nature, the publication of this document by Herman Wirth provoked a hostile reaction from the academic establishment that led to his dismissal from the German government. Wirth's critical examination of the document in the afterword to this book remains an invaluable source of evidence regarding the authenticity of its origins.