Faust: The Second Part of the Tragedy (German: Faust. Der Tragodie zweiter Teil), is the second part of Goethe's Faust. It was published in 1832, the year of Goethe's death. Because of its complexity in form and content, it is usually not read in German schools, although the first part commonly is. It can be seen as one of the most difficult works of World literature, requiring an extensive knowledge of Greek mythology. Only part of Faust I is directly related to the legend of Johann Faust, which dates to at latest the beginning of the 16th century (thus preceding Marlowe's play). The "Gretchen" subplot, although now the most widely known episode of the Faust legend, was of Goethe's own invention. In Faust II, the legend (at least in a version of the 18th century, which came to Goethe's attention) already contained Faust's marriage with Helen and an encounter with an Emperor. But certainly Goethe deals with the legendary material very freely in both parts.