Severus bar Ma'nu, client King under Rome (212–214)	
Abgar (X) Severus Bar Abgar (IX) Rabo, client King under Rome (214–216)
Ma’nu (IX) Bar Abgar (X) Severus, client King under Rome (216–242)
Abgar (XI) Farhat Bar Ma’nu (IX), client King under Rome (242–244)	

Palmyra –
Odaenathus (bef. 258–267)
Zenobia Regent (267–272)
Vaballathus King (267–272)

Roman Empire: East –
Diocletian, Eastern Augustus (284–305)
Galerius, Eastern Caesar (293–311)

Persia
Persia, Parthian Dynasty (complete list) –
Vologases V, Great King, Shah (191–208)
Vologases VI, Great King, Shah – in civil war (208–228)
Artabanus V, Great King, Shah – in civil war (208–224)

Adiabene (complete list) –
Shahrat (Shahrad), client King under Parthia (c.213–224)

Characene (complete list) –
Maga, client King under Parthia (c.195–210)
Abinergaos III, client King under Parthia (c.210–222)

Elymais (complete list) –
Unknown client King under Parthia (c.190–c.210)
Unknown client King under Parthia (c.210–c.220)
Orodes VI client King under Parthia (c.220–224)

Persia, Sassanid Dynasty (completeoffering no proof, he said Spanish authorities disrupted an ETA plot to place explosives on trains in December.

"Any attempt to divert attention from those responsible for the attack is intolerable," he added.

OK, so the government says it is Basque separatists. However:

ETA has never been able to mount an attack of this scale, however. And Arnoldo Otegi, the head of the outlawed Batasuna party, the political party connected with ETA, went on the radio Thursday to declare that Islamic extremists, rather than ETA, were responsible.

It's interesting to see how the government's official stetement serves their purposes - after all, any separatist group needs to be discredited, from their perspective, to ensure the contiguity of the existing Spanish state.

However, the political wing of the Basque separatist movement is trying to