View on large rock relief from the era of Sassanid Empire of Persia. Taq wa San or Taq-e Bostan, arch of Stone is a site with several large rock reliefs from the era of Sassanid Empire of Persia. They illustrates ceremonies of Ardashir II, Shapur II, Shapur III and Khosrau II and also the hunting scenes of Khosrau II.