Tash-Rabat was constructed in the 15th century, on the ancient trade route from Central Asia to China, and was a resting place for merchants, ambassadors, travelers and other wanderers. It is the largest structure built of stone from Central Asian architecture of that epoch. It is notable not only for it's size and building materials, but also for its special layout, based on perfect symmetry. Lost among the primeval wilderness, far from inhabited locations, the caravanserai looks unbleached, monumental and unassailable.