House of Sasan
The House of Sasan was the house that founded the Sasanian Empire, ruling this empire from 224 to 651. It began with Ardashir I, who named the dynasty as Sasanian in honour of his grandfather, Sasan, and after the name of his tribe.
The Shahanshah was the sole regent, head of state and head of government of the empire. At times, power shifted de facto to other officials, namely the spahbed.
