The "Taq-e-Bostan" (Bostan Arch) or "Taq-e-Vostan" (Vostan Arch) is situated to the right of the city entrance of Kermanshah, and is to the north east of this city.

This aggregate which comprises of engravings and epigraphs is related to the Sassanide era. The same is located in the mountain, and together with the natural surroundings, a gorgeous landscape comes into view.

On entering this area, the first epigraph is related to Ardeshir II. Ardeshir stands between Ahouramazda and Mitra. His face turned towards Ahouramazda, and his left hand receiving a wreath of friendship from Ahoura Mazda. Under their feet lies the enemy or "Ahriman".