Nafpaktos is the prefecture's third largest town, famous for the battle that took place off its shores on 7 October in 1571.
The sea battle was between the Ottoman Empire and Holy League forces from Spain, Venice, Genoa, and the Papal States jointly commanded by the Spanish soldier Don John of Austria.
It took place in the Mediterranean Gulf of Corinth off Lepanto - the Greek port of Naupaktos - then in Turkish possession. It was not decisive, but the combined western fleets halted Turkish expansion and broke Muslim sea power.
