The Lucidarius, a 12th century compendium of knowledge about God, the universe and salvation, was one of the most successful German books up into the modern age. Its origin is linked with the name of Henry the Lion. This volume covers the medieval manuscript transmission of the Lucidarius and explores its readership, geographical impact and text reception. 46 illustrations and maps, tables and manuscript stemmata are included in the work. Two essays on the oldest world map in a German text and the prologues A and B so important for the history of the manuscript transmission...