The ancient Halos, initially said Homeric catalog of the New, while the word «’Αλευς» found in Demosthenes, in inscriptions and coins of the 4th and 3rd centuries BC, as well as alternative «Αλούσιος» and «Άλιος» mainly in following texts. The Classical period is characterized as a "polis" of Demosthenes and located in Achaia in the coastal region. From Herodotus is known and the existence of a sanctuary dedicated to Zeus Lafystios while Strabo called the city « ο Άλος», «Άλος Αχαϊκή»and «Χλίος». Patron goddess was Artemis Panachaiko as found in Xenophon. According to legend the founder of the city is the Athamantas whose children Frixos and Elli depicted on city coins with the inscription «ΑΛΕΩΝ». Another form depicted on city coins is Zeus Lafystios. For the location of the classical city of Alos, no clear indications although it has been proposed to place Magoula Plataniotiki (pteleos) under some fragmentary ruins identified. In 347 BC the Alos besieged by Parmenion and delivered at Farsala. In 302 BC the Alos rebuilt at "Kefalosi" in the southern part of the plain of Almyros Othris between the mount and the sea of Pagasitikos Gulf. The reestablishment of the Hellenistic period is connected with the name of Demetrius Poliorkitis. The town occupied a very important place in antiquity, as it was communicated to the point where the northern to the southern part of the country.
According to recent research done in space, habitation started from the Late Bronze Age and continued to the Geometric, and Archaic and Hellenistic period. For the reconstruction of this society we learn from the cemeteries of the ancient city and the building remains. Specifically, information indicating the residential function is the settlement remains dating from the 9th to the 8th century BC at the site of the Hellenistic Halos, who gave us parts arched buildings with warehouses and children burials within the walls. Remarkable is the reference area of the cemetery, the number of burials and the variety in worship and practice of the dead, which included burials-burial, and cremation-burials, events which date to the 9th century. BC . According to surveys of residential waste and the city's coins, ancient Halos abandoned in the 3rd century. BC, probably by an earthquake but re-inhabited in the 2nd century. BC by a small number of inhabitants having small spaces and makeshift structures stay around the central gates of the walls. For the occupations of residents are informed of the movable finds that came to light. Such occupation was farming, livestock breeding, fishing and to a lesser degree hunting. Coins from the mid 4th up to the 2nd century. BC testify to the city's contacts with other regions such as Thessaly, Evia, Fthiotida and Macedonia. Since many travelers recorded the existence of fortification and residential waste, which gradually ceased to be visible through the cultivation of land and the use of waste as building materials from their residents. In the western section of the city fortification distinguished residues fortified citadel of Byzantine times, length 380m. and a width of 125 m. with walls preserved to a length of 900 m.
Surveys of the area starting late 1970 and continue until today by the thirteenth Prehistoric and Classical Antiquities and the Dutch Archaeological Institute. In the first phase of research was a survey of the ruins and excavations five Hellenistic houses of the Dutch Archaeological Institute in 1976-1990 period. Between 1990-2003 goal was to come to light most of the southeastern central gate of the fortification, which eventually was used and after the abandonment of the city in the middle of the 3rd century. BC. Alongside excavations in areas outside the walls uncovered parts of the city's cemeteries.
In the nearby area of Voulokalivas, 5km. East of the village of Platanos and north of Halos, unearthed burial mounds with burials / cremations dating to the Iron Age, whose existence has been known since 1912 by Wace and Thompson, who found fifty four tumuli sixteen pits pyres dead. The most recent surveys XIII ECHS revealed forty tombs of the Iron Age with an area of 1.5 km. North-oriented, having a direct relationship with arched buildings of the same period at "Kefalosi". Excavations two tombs unearthed gems such as iron weapons, tools and jewelry. South of Halos and just one km. At the seat Agrielies Platanos revealed a proto cemetery and Geometric period (10th -9os cent. BC) with graves, stone courtyard and Mycenaean depositor tender, which certifies the permanent habitation the wider area of Halos from the Late Bronze Age to the Hellenistic period.
- Β. Αδμύρη- Σισμάνη, «Άλος» στο «Αρχαίες πόλεις Θεσσαλίας και περίοικων περιόχων», Αρχαιολογικό Ινστιτούτο Θεσσαλικών Σπουδών, Π.Ε.Δ Θεσσαλίας, 2012, (σελ.245-250).