Donauwörth, Ulm, Haguenau, Duisburg, Kaiserswerth, Frankfurt, Gelnhausen and Dortmund. He also granted privileges exempting the merchants of Aachen, Gelnhausen, Haguenau, Monza, Rome, Pisa and Venice from all tolls within the Empire. Cultural depictions Charismatic leader Otto of Freising, Frederick's uncle, wrote an account of his reign entitled Gesta Friderici I imperatoris (Deeds of the Emperor Frederick), which is considered to be an accurate history of the king. Otto's other major work, the Chronica sive Historia de duabus civitatibus (Chronicle or History of the Two Cities) had been an exposition of the Civitas Dei (The City of God) of Augustine of Hippo, full of Augustinian negativity concerning the nature of the world and history. His work on Frederick is of opposite tone, being an optimistic portrayal of the glorious potentials of imperial authority. Otto died after finishing the first two books, leaving the last two to Rahewin, his provost. Rahewin's text is in places heavily dependent on classical precedent. For example, Rahewin's physical description of Frederick reproduces word-for-word (except for details of hair and beard) a description of another monarch, Theodoric II written nearly eight hundred years earlier by Sidonius Apollinaris: Frederick's charisma led to a fantastic juggling act that, over a quarter of a century, restored the imperial authority in the German states. His formidable enemies defeated him on almost every side, yet in the end he emerged triumphant. When Frederick came to the throne, the prospects for the revival of German imperial power were extremely thin. The great German princes had increased their power and land holdings. The king had been left with only the traditional family domains and a vestige of power over the bishops and abbeys. The backwash of the Investiture controversy had left the German states in continuous turmoil. Rival states were in perpetual war. These conditions allowed Frederick to be both warrior and occasional peace-maker, both to his advantage. Legend Frederick is the subject of many legends, including that of a Kyffhäuser legend. Legend says he is not dead, but asleep with his knights in a cave in the Kyffhäuser mountains in Thuringia or Mount Untersberg at the border between Bavaria, Germany, and Salzburg, Austria, and that when the ravens cease to fly around the mountain he will awake and restore Germany to its ancient greatness. According to the story, his red beard has grown through the table at which he sits. His eyes are