Analysis of information sources in references of the Wikipedia article "Siria (provincia romana)" in Galician language version.
The governor of Syria retained the civil administration of the whole large province undiminished, and held for long alone in all Asia a command of the first rank. [...] It was only in the course of the second century that a diminution of his prerogatives occurred, when Hadrian took one of the four legions from the governor of Syria and handed it over to the governor of Palestine. It was Severus who at length withdrew the first place in the Roman military hierarchy from the Syrian governor. After having subdued the province —which had wished at that time to make Niger emperor, as it had formerly done with its governor Vespasian— amidst resistance from the capital Antioch in particular, he ordained its partition into a northern and a southern half, and gave to the governor of the former, which was called Coele-Syria, two legions, to the governor of the latter, the province of Syro-Phoenicia, one [legion]. (Image of p. 117 and p. 118 at Google Books)
No 194 d.C., o emperador Septimio Severo dividiu a provincia de Siria e fixo da parte norte nunha provincia separada chamada Coele Siria.