The mediæval history of Italy is in like manner dependent almost entirely upon the records of the literary monks. The great collection of Muratori is based upon the monkish chronicles, especially of those of Volturna, Novalese, Farfa, Casa Aurio, and of Monte Cassino. From the latter abbey, there sprang a series of distinguished historians: Johannes Diaconus, the biographer of S. Gregory the Great, who wrote during the reign of Charlemagne; Paulus Diaconus, the friend of Charlemagne; Leo, Bishop of Ostia, first author of the famous chronicle of Monte Cassino, and Peter Diaconus, who continued its chronicle. Another monk of Monte Cassino recounts the wonderful story of the conquest gained by the Norman chivalry in the two Sicilies, a story reproduced and completed by the Sicilian monk Malaterra. The list of the learned historians in the German monasteries is also an important one. The German collections of _scriptories_, such as those of Eckard, Pez, Leibnitz, and others, present an enormous mass of monastic chronicles. Among the earlier chroniclers were to be noted Eginard, Theganus, and Rodolphus of Fulda, who preserved the records of the dynasty of the Carlovingians. One of the earlier historians of Charlemagne was a monk of St. Gall, while the chronicles of that abbey, carried on by a long series of its writers, have left a most valuable and picturesque representation of successive epochs of its history. Regino, Abbot of Prüm, wrote a history of the ninth century. Wittikind, a monk of Corvey, wrote the chronicles of the reign of Henry I., and of Otho the Great. Ditmar, who was at first a monk of Magdeburg and later Bishop of Mersebourg, has left a detailed chronicle, extending from 920 to 1018, of the emperors of the House of Saxony. Among the eleventh-century writers, is Hermannus Contractus, son of the Count of Woegen, who was brought up at St. Gall but was later attached to Reichenau. The history of the great struggle between the Church and the Empire was written by Lambert, a monk of Hersfeld, and continued by Berthold of Reichenau, Bernold of St. Blaise, and by Ekkhard, Abbot of Aurach.[77] The first historian of Poland was a French monk named Martin, while another monk of Polish origin, named Nestor, who died in 1116, composed the earliest annals of Russia (then newly converted to Christianity) which were known to Europe. Among the monkish historians of the eleventh century, the most noteworthy were William of Malmesbury, Gilbert of Nogent, Abbot Suger, and Odo of Deuil.