A is the only surviving evidence that the title king of kings was given to Mithridates during his lifetime; the title was highly symbolic, because of its association with the Achaemenid kings. The other evidence for his use of the title is B, a later inscription in honour of his granddaughter Dynamis. Both inscriptions were found near the Cimmerian Bosporos.
The significance of Mithridates' use of the title has been discussed by L. Ballesteros-Pastor, "Notas sobre una inscripción de Ninfeo en honor de Mitrídates Eupátor, rey del Ponto" ( Persée ); he dates inscription A to the time of the First Mithridatic War, but E.A.Molev, in "Mithridates VI and the Pontic Kingdom", page 322 ( PDF ) suggests an earlier date, soon after Mithridates gained control of the Bosporan region.
[A] [The (?) people of Nymphaion] honours the [great] king of kings [Mithridates] Eupator Dionysos, the [saviour and] benefactor [of (?) the Nymphaians], who has conquered [(?) the Scythians], [on account of his] achievements and on account of [his (?) goodwill . . .]
[B] The people of Agrippia honours queen Dynamis Philoromaios, daughter of the great king Pharnakes, the son of the king of kings Mithridates Eupator Dionysos, their saviour and benefactor.
Attalus' home page | 14.05.18 | Any comments?