The raid on the Bay of Naples occurred in 1544 when Algerians captured the Bay of Naples and enslaved 7,000 Neapolitans.

In 1544, Algerian corsairs sailed into the Bay of Naples and raided it. They then took an estimated 7,000 Neapolitan slaves. The Barnes Review, Volume 12 TBR Company, Imperial Ambition in the Early Modern Mediterranean: Genoese Merchants and the Spanish Crown Céline Dauverd Cambridge University Press,

The number of slaves taken by the Algerians drove the price of slaves so low that it was said "you could swap a Christian for an onion". Tragedy and Postcolonial Literature Ato Quayson Cambridge University Press, Holy War and Human Bondage: Tales of Christian-Muslim Slavery in the Early-Modern Mediterranean: Tales of Christian-Muslim Slavery in the Early-Modern Mediterranean Robert C. Davis ABC-CLIO, Moreover, it was said to be "raining Christians in Algiers".

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