Ludus as Prelude Discourses of the Muslim Other Muslims in Hrotsvit's 'Pelagius' and the Ludus de Antichristo Mandatory Muslim Metamorphosis in Crusader Epic Wolfram von Eschenbach, Gyburc, and Tolerance Walther von der Vogelweide, Crusader Lyric and the Discourse of the Other A Twelfth-Century Paradigm Shift?