Bagadates I

Baydad (also spelled Bagdates), was a dynast (frataraka) of Persis from 164 to 146 BC.

== Background == thumb|upright=1.5|Location of Persis under the [[Achaemenid Empire]] Since the end of the 3rd or the beginning of the 2nd century BCE, Persis had been ruled by local dynasts subject to the Seleucid Empire. They held the ancient Persian title of frataraka ("leader, governor, forerunner"), which is also attested in the Achaemenid-era. The Achaemenid Empire, which had a century earlier ruled most of the Near East, originated from the region. The frataraka themselves emphasized their close affiliation with the prominent Achaemenid King of Kings, and their court was probably at the former Achaemenid capital of Persepolis, where they financed construction projects on and near the Achaemenid plateau. The frataraka had traditionally been regarded as priestly dynasts or advocates of religious (and political) opposition to Hellenism, however, this is no longer considered the case.