This decay was accelerated by the infighting of local families: the ancient Roman Sergi family and the Ionotasi (1258–1271) and the clash between Venice and Genoa for the control of the city and its harbour (late 13th and 14th centuries).
Ovo opadanje ubrzano je sukobima lokalnih obitelji: antičkom obitelji Sergijevaca s obitelji Ionotasi (1258-1271) i sukobom Venecije s Genovom oko kontrole nad gradom i njegovom lukom (kasno 13. - 14. stoljeće).