Helmos is known to have existed since antiquity: where was built the fortress of Velemina. In Byzantine times Helmos is known from three incidents that concerned it, and from a “chrysobull” (golden bull, document issued by the emperor). In 1263 the Byzantine forces from Mystra, assisted by the sebastokrator Constantine Palaiologos, the brother of Emperor Michael VIII, on their way to take Veligosti passed through the area of Chelmos. The second event mentioning it took place in 1272, when John de Nivelet was appointed commander of Nikli: from there he overran and plundered Veligosti and the Chelmos region. The fort of Chelmos appears yet again in an incident that occurred in 1296, when a Frankish knight of Nemnitsa, one Girard de Rèmy, during a trade-fair at Livadi in Vervaina, struck the Greek silk-merchant Korkodilo with his spear. In order to avenge the insult, Korkodilo conspired with his son-in-law Aviv and the Byzantine commander of Chelmos, Leon Mavropapas, and occupied the castle of Ag. Georgios of the Skorta. The region of Chelmos is also referred to in the 1320 edict issued by Emperor Andronicus II, on behalf of the Monastery of Vrontochion at Mystra.
Χρονολόγηση: Frankish/Late Byzantine periods (13th-15th centuries)