Bisotun is located along the ancient trade route linking the Iranian high plateau with Mesopotamia and features remains from the prehistoric times to the Median, Achaemenid, Sassanian, and Ilkhanid periods. The principal monument of this archaeological site is the bas-relief and cuneiform inscription ordered by Darius I, The Great, when he rose to the throne of the Persian Empire, 521 BC. The bas-relief portrays Darius holding a bow, as a sign of

The Historical site of Tagh-e Bostan or (Taq-e Bostan) is situated in Kermanshah City in Iran. Taq means an Arch and Bostan means A very beautiful garden. Thus, Taq-e Bostan means an Arch of a very beautiful garden. The appellation of taq or arch here refers to two ancient arch from Sassanid dynasty in Iran. Tagh-e Bostan is consists of the big arch, small arch and a plate of stone inscription outside the cave. These two arches have been carved out of stone in the mountain. Outside the big cave there are two winged angels holding a medallion. Inside the cave there are many carvings including a big horse and a rider which is “Khosro Parviz” the king of Iran in Sassanid period.