After conquering Ctesiphon in 226 he staged an official coronation in the city where he was crowned as `` Shahanshah '' `` king of kings [ of ] Iran '' ( his consort took the title `` Adhur-Anahid '' meaning `` Queen of Queens '' ) , Ardashir finally brought the over 400 year-old Parthian Empire to an end and began four centuries of Sassanid rule .
Ardashir I was crowned in 226 as the '' Šāhān šāh Ērān '' `` king of kings [ of ] Iran '' ( his consort Adhur-Anahid took the title `` Queen of Queens '' ) , Ardashir finally brought the over 400 year-old Parthian Empire to an end and began four centuries of Sassanid rule .