Eastern Han Dynasty (25 - 220)In 73AD, Ban Chao set off on a diplomatic trip to western China and reopened the road, and later his assistant extended this route to the Persian Gulf. In 166AD, the Roman Empire sent an envoy to China. Then ties with the Europe were formed through this...
Persian Royal Road, ancient road running from Susa, the ancient capital of Persia, across Anatolia to Sardis and Smyrna on the Aegean Sea, a distance of more than 2,400 km (1,500 miles). King Darius I built the road to facilitate communication throughout