Tagh’e Bostan is a series of large rock reliefs from the Sassanid Era located 5 kilometers from the city center of Kermanshah. It is located in the heart of the Zagros Mountains, where it has endured almost 1,700 years of wind and rain. The carvings, some of the finest and best-preserved examples of Persian sculpture under the Sassanids, include representations of the investitures of Ardeshir II (379–383) and Shapur III (383–388). Like other Sassanid symbols, Tagh’e Bostan and its relief patterns accentuate power, religious tendencies, glory, honor, the vastness of the court, game and fighting spirit, festivity, joy, and rejoicing.Sassanid Kings chose a beautiful setting for their rock reliefs along an historic Silk Road caravan route waypoint and campground. The reliefs are adjacent a sacred spring that empties into a large reflecting pool at the base of a mountain cliff. Tagh’e Bostan and its rock reliefs comprise two big and small arches. They illustrate the crowning ceremonies of Ardeshir I and his son, Shapur I, Shapur II and Khosro II. They also depict the hunting scenes of Khosro II.One of the most impressive reliefs inside the largest grotto or ivan is the gigantic equestrian figure of the Sassanid King Khosro II (591-628 CE) mounted on his favorite charger, Shabdiz. Both horse and rider are arrayed in full battle armor. The arch rests on two columns that bear delicately carved patterns showing the tree of life or the sacred tree. Above the arch and located on two opposite sides are figures of two winged angles with diadems. Around the outer layer of the arch, a conspicuous margin has been carved, jagged with flower patterns. The equestrian relief panel measures 7.45 meters across and 4.25 meters high.