Sister Catherine Treatise

13th-century Strasbourg

The Sister Catherine Treatise (German: Daz ist Swester Katrei Meister Eckehartes Tohter von Straezburc) is a work of medieval Christian mysticism seen as representative of the Heresy of the Free Spirit of the thirteenth and fourteenth centuries in Europe. Wrongly attributed to Christian mystic Meister Eckhart, it nevertheless shows the influence of his ideas (as evinced by the full German title) or at least the ideas which he was accused or attributed as having had by the Inquisition.