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The chief secretary of Artabanus, Dad-windad, was afterwards executed by Ardashir I. Thenceforth, Ardashir I assumed the title of "shahanshah" ("King of Kings") and started the conquest of an area which would be called Iranshahr ("Ērānshahr"). He celebrated his victory by having two rock reliefs sculptured at the Sasanian royal city of Ardashir-Khwarrah (present-day Firuzabad) in his homeland, Pars. The first relief portrays three scenes of personal fighting; starting from the left, a Persian aristocrat seizing a Parthian soldier; Shapur impaling the Parthian minister Dad-windad with his lance; and Ardashir I ousting Artabanus IV. The second relief, conceivably intended to portray the aftermath of the battle, displays the triumphant Ardashir I being given the badge of kingship over a fire shrine from the Zoroastrian supreme god Ahura Mazda, while Shapur and two other princes are watching from behind.