[[Image:Sassanid_empire_map.gif|450px|right|The borders of the Sassanid Empire
The '''Sassanid Empire''' (226-651 A.D.) was a [[monarchy]] in what is now [[Iran]].<ref>[http://www.iranchamber.com/history/sassanids/sassanids.php History of Iran: Sassanid Empire]</ref> It was the only nation to use [[Zoroastrianism]] as the state religion. The empire was destroyed in 651 by the first of the [[Islamic Caliphates]].
===History ===The Sassanid Empire was founded in 226 A.D. by [[Ardashir I]]. At the height of power, the empire extended to the borders shown in the image. The most famous ruler of the Sassanid Empire is [[Khosro I]].