Niketas Choniates
After many disastrous adventures, the destruction of Prester John's Kingdom by the White Huns followed by a long stint of slavery at the hands of the Old Man of the Mountain, Baudolino and surviving members of his band of friends return to Constantinople undergoing the agony of the Fourth Crusade – the book's starting point. Niketas Choniates helps Baudolino discover the truth about how the Emperor Frederick died – with shattering results for Baudolino and his friends.