In 1544 , Hayreddin Barbarossa captured Ischia , taking 4,000 prisoners in the process .
In 1544 , Hayreddin Barbarossa deported to slavery some 9,000 inhabitants of Lipari , almost the entire population .
In 1544 , Hayreddin Barbarossa captured Ischia , taking 4,000 prisoners in the process , and deported to slavery some 9,000 inhabitants of Lipari , almost the entire population .