- Henry Dickinson Westlake
- and Antony Spawforth
Tetrarchy was first used to denote one of the four political divisions of *Thessaly (‘tetrad’ being a purely geographical term). The term found its way to the Hellenistic east and was applied to the four divisions into which each of the three Celtic tribes of *Galatia was subdivided (Strabo 12. 5. 1, 567 C). In Roman times many Hellenized *client kings in Syria and Palestine were styled ‘tetrarch’, but the number of tetrarchies in any political organization ceased to be necessarily four, denoting merely the realm of a subordinate dynast. Modern scholars conventionally describe as a ‘tetrarchy’ the system of collegiate government (two senior Augusti, two junior Caesars) instituted by *Diocletian (ce 293); the usage has no ancient authority.
- Greek History and Historiography
- Greek Law