The other branch of the Silk Road is the same western highway that runs from Hamadan to Baghdad.
The Silk Road not only was a way for the caravans to pass but also cultures, customs and techniques, including writing, knitting, agricultural techniques, and
riding were also moved the same route from East to West. The technology of making paper spreads through the Silk Road to other states.
In some sources the Silk Road protraction is about eight thousand kilometers. It was not possible to travel all this route with limited Facilities, so the
were built on this road, and equipment such as lanterns and minarets became the cultural legacy of traveling on this road.