At the Crossroads of Central Asia : The Kingdom of Kroraina -- Gateway to the Languages of the Silk Road : Kucha and the Kizil Caves -- Midway Between China and Iran : Turfan -- Homeland of the Sogdians, the Silk Road Traders : Samarkand and Sogdiana -- The Cosmopolitan Terminus of the Silk Road : Historic Chang'an, Modern-day Xi'an -- The Time Capsule of Silk Road History : The Dunhuang Caves -- Entryway into Xinjiang for Buddhism and Islam : Khotan -- Conclusion: The History of the Overland Routes Through Central Asia