The Silk Roads

PETER FRANKOPAN is a historian based at Oxford University. He is the author of The First Crusade: The Call from the East, a major monograph about Byzantium, Islam and the West in the eleventh and twelfth centuries. He is a senior research fellow at Worcester College, Oxford, and the director of the Oxford Centre for Byzantine Research at Oxford University. His revised translation of The Alexiad was published in the United States in 2009.