Located just north of Persepolis, Naqsh-e-Rajab is the site of four major Sasanian rock reliefs: the investiture of Ardashir I (r. 224-240 CE), the founder of the Sasanian dynasty; an inscription by the Zoroastrian high priest Kirdir; and two reliefs of Shapur I (r. 240-270 CE), the second Sasanian king, who was responsible for expanding and solidifying Persian control over the region. Several elements in the reliefs recur in later Sasanian depictions of kingship, such as Ahura Mazda's role in royal investitures and the fluttering ribbons that signify farr.