SI´LBIUM(Σίλβιον: Eth. Silbianus), a small town of Phrygia, on the east of Apamea and Celaenae, and beyond the source of the Maeander (Ptol. 5.2.25; Plin. Nat. 5.29). In the Byzantine writers it is sometimes mentioned under corrupt forms of its name, such as Silbia (Hierocl p. 667), Sublas (Cinnamus, 6.15), or Sublium and Syblaea ( Oriens Christ. p. 809). This place, which was the see of a bishop, belonged to the conventus of Apamea. Modern travellers seek its site in the neighbourhood of Sandukli. (Kiepert, in Franz's Fünf Inschriften, p. 37.)
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