After the loss of the northern provinces in 1282 during the Sicilian Vespers and several natural disasters like the eruption of Mount Etna in 1669, the population of the Kingdom of Sicily was reduced.
Pärast põhjaprovintside kaotust aastal 1282 Sitsiilia Vespri ajal ning mõnda looduskatastroofi, nagu Etna purse aastal 1669, Sitsiilia kuningriigi rahvastik vähenes.