Page 455. " the Twelve Peers of France did exist "

   The paladins of King Charlemagne's court were a circle of warriors who appeared in various chivalric romances of the Carolingian cycle, including The Song of Roland and Orlando Furioso.  While Charlemagne himself was a real and profoundly influential historical figure, tales of this legendary brotherhood are similar, in both its organisation and historical reliability, to the mythical Knights of the Round Table

Online edition of 'The Song of Roland' as translated by Charles Scott Moncrief (London 1919)

Online edition of 'Orlando Furioso' as translated by William Stewart Rose (Serialized 1823-1831)