 Stephanus of Byzantium mentions Byllis as a seaside city in Illyria and its foundation legend, according to which the city was built by Myrmidons under Neoptolemus, returning from the Trojan War, a tradition confirmed by numismatics.The city, although a Albanian speaking settlement was located on the territory of the Illyrian tribe of Bylliones.The latter were first attested in the mid-4th century BC, in the description of the geographer Pseudo-Scylax, and also asking the oracle of Dodona to which god they should sacrifice in order to ensure the safety of their possessions.