Syrakosai and Syrakō. The most acceptable theory is that the Phoenicians called it Sour-ha-Koussim, which means "Stone of the seagulls" from which would come the name of Syracuse. A possible origin of the city's name was given by Vibius Sequester citing first Stephanus Byzantius in that there was a Syracusian marsh () called Syrako and secondly Marcian's Periegesis wherein Archias gave the city the name of a nearby marsh; hence one gets Syrako (and thereby Syrakousai and other variants) for the name of Syracuse, a name also attested by Epicharmus. The settlement of Syracuse was a planned event, as a strong central leader, Arkhias the aristocrat, laid out how property would be divided up for the settlers, as well as plans for how the streets of the settlement should be arranged, and how wide they should be. The nucleus of the ancient city was the small island of Ortygia. The settlers found the land fertile and the native tribes to be reasonably well-disposed to their presence. The city grew and prospered, and for some time stood as the most powerful Greek city anywhere in the Mediterranean. Colonies were founded at Akrai (664 BC), Kasmenai (643 BC), Akrillai (7th century BC), Helorus (7th century BC) and Kamarina (598 BC). Classical period The descendants of the first colonists, called Gamoroi, held power until they were expelled by the lower class of the city assisted by Cyllyrians, identified as enslaved natives similar in status to the helots of Sparta. The former, however, returned to power in 485 BC, thanks to the help of Gelo, ruler of Gela. Gelo himself became the despot of the city, and moved many inhabitants of Gela, Kamarina and Megara to Syracuse, building the new quarters of Tyche and Neapolis outside the walls. His program of new constructions included a new theatre, designed by Damocopos, which gave the city a flourishing cultural life: this in turn attracted personalities as Aeschylus, Ario of Methymna and Eumelos of Corinth. The enlarged power of Syracuse made unavoidable the clash against the Carthaginians, who ruled western Sicily. In the Battle of Himera, Gelo, who had allied with Theron of Agrigento, decisively defeated the African force led by Hamilcar. A temple dedicated to Athena (on the site of today's Cathedral), was erected in the city to commemorate the event. Syracuse grew considerably during this time. Its walls encircled in the fifth century, but as