Sillyum - A settlement in Pamphylia also known as Sillyon
Sillyum or Sillyon was an important fortress and city near Attaleia in Pamphylia, on the southern coast of modern Turkey. The native Greco-Pamphylian form was Selyniys, possibly deriving from the original Hittite Sallawassi.

Throughout Antiquity, the city was relatively unimportant. According to one legend, the city was founded as a colony from Argos, while another holds that it was founded, along with Side and Aspendos, by the seers Mopsos, Calchas and Amphilochus after the Trojan War.

The city has an attested continuous coinage from the early 3rd century BC up to the reign of Aurelian. Silver tetradrachms of the Alexandrian and Lysimachian types were minted between 281 and 190 BC, but other than that, the city's coinage is in bronze.

3rd-century BC coins feature a bearded head or a standing figure, possibly identifiable with Apollo, or a lightning and the inscription ΣΕΛΥΝΙΥΣ (the native Pamphylian name). Coinage under Roman suzerainty featured the same motifs, but with the inscription hellenized to ϹΙΛΛΥΕΩΝ ("of the Sillyeans").

Modern location:

(1) Gallienus | Salonina 253-268 AD
Obverse: radiate, draped and cuirassed bust of Gallienus left , confronting laureate and draped bust of Salonina right; AV K ΠO ΛI ΓAΛΛIHNOC / I
Reverse: Tyche standing half left, holding rudder and cornucopia; CIΛΛ_V_EΩN
Ref: obverse: SNG RIGHETTI 1320; SNG v. ...
(2) Philip II Junior 244-249 AD
AE unit Sillyum
Obverse: AV K M IO CEOV ΦIΛIΠΠOC CE, Bust of Philip facing right, wearing laurel wreath, cuirass, and drapery
Reverse: CIΛΛVEΩN, Tyche standing face left, holding rudder and cornucopia
Ref: SNG France 1001