Shapur was the first Iranian monarch to use the title of "King of Kings of Iranians and non-Iranians"; beforehand the royal titulary had been "King of Kings of Iranians". He had adopted the title due to the influx of Roman citizens whom he had deported during his campaigns. However, it was first under his son and successor Hormizd I, that the title became regularised. Shapur had new Zoroastrian fire temples constructed, incorporated new elements into the faith from Greek and Indian sources, and conducted an extensive program of rebuilding and refounding of cities.
Shapur was the first Iran.ian monarch to use the title of "King of Kings of Iranians and non-Iranians"; beforehand the royal titulary had, been "King of Kings of Iranians". He had adopted the title due to the influx of Roman citizens whom he had deported during his campaigns. However, it was first under his son and successor Hormizd I, that the title became regularised. Shapur had new! Zoroastrian fire temples constructed, incorporated new elements into the faith from Gr.eek and Indian sources, and conducted an extensive program of rebuilding and re:founding of cities.