The Theologia Germanica is believed to have been written around 1350, by a priest in the house of the Teutonic order in Frankfort, Germany. The author may have been associated with the "Friends of God," led by Dominicans, John Tauler and Blessed Henry Suso. This book came to the attention of Martin Luther, and he is credited with giving the treatise its modern name. Written over a century before Luther's time, its theology draws upon the Latin Christianity...