 Odaenathus was described as Roman senator in the undated tomb inscription and Hairan I was mentioned with the same title in the 251 inscription . <unk> opinions vary on the exact date of Odaenathus ' elevation to the position ; <unk> and Jean <unk> maintain that the <unk> rank predates the Ras elevation . <unk> Hartmann concludes that Odaenathus first became a Ras in the 240s then a senator in 250 . Another possibility is that the <unk> rank and lordship occurred simultaneously ; Odaenathus was chosen as a Ras following Gordian 's death , then after Philip the Arab concluded a peace with the Persians , the emperor ratified Odaenathus ' lordship and admitted him to the <unk> to guarantee Palmyra 's continuous subordination . 
