Galatia Prima covered the northeastern part of the old province, retaining Ancyra as its capital and was headed by a consularis.

Salutaris comprised the southwestern half of the old province and was headed by a praeses, with its seat at Pessinus.

According to the canons of the Council of Chalcedon (451) and the Synecdemus of Hierocles (c. 531), the province of Galatia Prima had Ancyra as its metropolitan see, with six suffragan sees: Tavium, Aspona, Kinna, Lagania or Anastasiopolis, Mnizos and Juliopolis.

[1][2] According to the canons of the Council of Chalcedon and the Synecdemus, the province of Galatia Secunda had Pessinus as its metropolitan see, with eight suffragan sees: Orkistos, Petinessos, Amorium, Klaneos (absent in Chalcedon), Troknades, Eudoxias, Myrika and Germa or Myriangelon.

[3] Pessinus sank into decay when Justinianopolis was founded in the mid-6th century and eventually the metropolitan see was transferred there, while retaining his title.