Editing Volos (section)

===Byzantine era===
{{Further|Byzantine Greece}}
Iolcus is still attested in the early Byzantine period but was eclipsed for most of the [[Middle Ages]] by Demetrias.<ref name="TIB165">{{Tabula Imperii Byzantini | volume = 1 | page = 165}}</ref> The [[Slavs|Slavic]] tribe of the [[Belegezites]] settled in the area during the 7th century.<ref name="TIB56">{{Tabula Imperii Byzantini | volume = 1 | page = 56}}</ref>

Volos first appears again in 1333, as one of the cities captured by the Byzantine general [[John Monomachos]] in Thessaly, under the name "Golos" (Γόλος).<ref name="TIB165"/> The name is of Slavic origin, from ''golo'', ''golъ'', "barren".<ref name="Hatzidakis">{{cite journal | last = Hatzidakis | first = G. N. | title = Γόλος–Βόλος | journal = Ἐπετηρίς Ἐταιρείας Βυζαντινῶν Σπουδῶν | volume = 7 | year = 1930 | pages = 231–233 | language = el | hdl = 11615/19950 }}</ref><ref name="Vasmer">{{cite book | last = Vasmer | first = Max | author-link = Max Vasmer | title = Die Slawen in Griechenland | publisher = Verlag der Akademie der Wissenschaften | location = Berlin | year = 1941 | pages=108–109 | url = http://macedonia.kroraina.com/en/mv/mv_3_5.htm#d3 }}</ref>  Another theory derives the name from Slavic ''golosh'', "seat of administration".<ref name="EI2">{{EI2 | last = Savvides | first = A. | title = Ḳuluz | volume = 12 | page = 544 | url = https://doi.org/10.1163/1573-3912_islam_SIM_8787}}</ref> Two alternative theories allude to a Greek origin through the words βολή (throw), as fishermen threw their nets into the sea from that area, and βώλος (piece of land) but the Greek scholar G. Hatzidakis considers them to be paretymologies at best.<ref name="Hatzidakis"/> The modern form of the name is first attested in 1540.<ref name="Vasmer"/>

The walls of medieval Golos follow the traces of the fortifications of ancient Iolcus, and many remnants of the ancient city have been found in the medieval citadel.<ref name="TIB166">{{Tabula Imperii Byzantini | volume = 1 | page = 166}}</ref>

Along with the rest of Thessaly, Volos fell under [[Serbian Empire|Serbian]] rule in 1348, governed by [[Gregory Preljub]].<ref>{{cite book | last=Soulis | first=George C. | year=1984 | title=The Serbs and Byzantium during the reign of Emperor Stephen Dušan (1331–1355) and his successors | publisher=[[Dumbarton Oaks]] | isbn=0-88402-137-8 | pages=108–110}}</ref> After Preljub's death Thessaly passed under the brief rule of [[Nikephoros II Orsini]], followed by the Serbian rulers [[Simeon Uroš]] and [[John Uroš]]. After the latter's death in 1373, Thessaly returned under Byzantine rule for twenty years, until its conquest by the [[Ottoman Empire]] under Sultan [[Bayezid I]].<ref>{{Tabula Imperii Byzantini | volume = 1 | pages = 75–76}}</ref>