linguistic:voice_change, structural:expansion, information:filtering, information:classification
Background

Khosrow I was reportedly born between 512 and 514 at Ardestan, a town located in the Spahan province in central Iran. The town, dating back to the Achaemenid period, thrived during Khosrow's age, and also included a fire temple, which was said to be founded by the mythological Kayanian king Kay Bahman, from whom the Sasanians claimed their descent. Khosrow was the youngest son of Kavad I, the ruling Sasanian shah. His mother was an Ispahbudhan princess, who was the sister of the leading Iranian general Bawi. The Ispahbudhan were one of the Seven Great Houses of Iran that formed the elite aristocracy of the Sasanian Empire. They in particular enjoyed such a high status that they were acknowledged as "kin and partners of the Sasanians". The family also held the important position of spahbed of the West, i.e. the Sasanian Empire's southwestern regions (Khwarwaran).

Following the tradition of the aristocratic or upper-class families, Khosrow would have started at school (frahangestān) between the age of five and seven. There he would learn to write and would learn the yashts, Hadokht, Bayān Yasn and Vendidad, following the same pattern of schooling made for a future priest (herbed). Furthermore, he would observe the Middle Persian translation of the Avesta, the Zend. Afterwards, he would be schooled in riding, archery, polo (chovgan) and military creativity.