Oloosson (Ancient Greek: Ὀλοοσσών)[1] was a town and polis (city-state)[2] of Perrhaebia in ancient Thessaly near Elone and Gonnus,[3] mentioned in the Catalogue of Ships in the Iliad by Homer, who gives to it the epithet of “white,” from its white argillaceous soil.
[4] In Procopius the name occurs in the corrupt form of Lossonus.
In a votive inscription from the first half of the fourth century BCE that is dedicated to Apollo Pythius are also the names of some people together with various demonyms from Perrhaebia.
[6] In another inscription dated in the 1st century BCE, election procedures of magistrates are mentioned.
[7] Ancient Oloosson was located at a site called Panayia in the modern town of Elassona.