Oloosson

39°53′55″N 22°11′15″E

Map showing ancient Thessaly. Oloosson is shown to the upper centre.

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.^[5]

Several Greek inscriptions have been found concerning the city of Oloosson. 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.^[8][9]