caption father predecessor successor death_date death_place religion title image_size queen image article_title name reign
coin of yazdegerd i shapur iii bahram iv shapur iv 21 january , 420 hyrcania , Ērānshahr zoroastrianism `` king of kings of iran and aniran '' 300px shushandukht yazdegerdicoinhistoryofiran.jpg yazdegerd i
 yazdegerd i 399 & nbsp ; -- 21 january , 420
yazdegerd i

yazdegerd i -lrb- < yzdkrt | > `` yazdekerd '' , meaning `` made by god '' ; new persian : `` yazdegerd '' -rrb- was the fourteenth sasanian king of persia and ruled from 399 to 420 .
he was the son of shapur iii -lrb- 383 -- 388 -rrb- .
he succeeded to the sasanian throne on the assassination of his brother bahram iv in 399 and ruled for twenty-one years till his death in 420 .
yazdegerd i 's reign was largely uneventful .
the king is described as being of a peaceful disposition .
there were cordial relations between persia and the eastern roman empire as well as between persia and the western roman empire .
early during his reign , yazdegerd was entrusted the care of the roman prince theodosius by his father arcadius on the latter 's death in 408 , and yazdegerd faithfully defended the life , power and possessions of the roman prince .
yazdegerd promoted christianity in the early years of his reign and later opposed it .
he is known in sasanian sources -lrb- and also in islamic persian sources who use sasanian sources as their references -rrb- as the sinner .
however , this is propaganda made by the zoroastrians due to his persecution of the zoroastrians who opposed him , and his tolerance towards his non-zoroastrian subjects , such as the christians and the jews .
yazdegerd also used the title of `` ramshahr '' -lrb- `` who maintains peace in his dominion '' -rrb- , which fitted to him , due to his peace with the romans and tolerance towards his subjects .
the title `` ramshahr '' was a title used by the legendary kayanid kings , and thus starts the sasanian interest in kayanid history , where they later would adopt the title of `` kay '' and use the slogan `` xwarrah '' .
however , due to the christians use of his tolerance to attack the zoroastrians , and the appointment of the intolerant `` vizier '' mihr narseh , resulted in persecutions of the christians , and also the struggle to convert armenia to zoroastrianism .
during yazdegerd 's last days , there took place a civil war between his sons .
bahram v emerged victorious and claimed the throne .
yazdegerd i died in 420 and was succeeded by his son bahram v.
