Sasanian Zoroastrian State Religion System

Timeline

1. 224–300Ctesiphon · MesopotamiaThe founding Sasanian kings took Zoroastrianism as the empire's ideological pillar; royal power and the priestly class formed an alliance, fire temples received state funding, and religious rituals were integrated into coronation and court ceremonies.
2. c. 300–500Iranian Plateau · Iranian PlateauThe Mobadan Mobad class perfected the clerical hierarchy and fire temple administration; monarchs such as Shapur I supported religious writing and the compilation of the oral Avesta texts, forming a state-approved doctrinal standard.
3. c. 500–651Iranian Plateau · Iranian PlateauIn the late period, priestly power grew conservative, and the state religion system could not integrate diverse religious communities; after the Arab conquest, its official status ended, and Zoroastrianism continued among the populace, influencing subsequent religious patterns.