Hartmann's literary efforts cover all the major genres and themes of medieval courtly literature. His Arthurian romances, Erec and Iwein, which he modeled after Chretien de Troyes, introduced the Arthurian world to German audiences and set the standard for later German writers. His lyric poetry treats many aspects of courtly love, including fine examples of the crusading song. His dialogue on love delineates the theory of courtly relationships between the sexes and the quandary the lover experiences. His verse novellas Gregorius and Poor Heinrich transcend the world of mere human dimensions and examine the place and duties of th