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In page Rack (torture):

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It is unclear exactly from which civilization the rack originated; the earliest examples are from Greece.[citation needed] The Greeks may have first used the rack as a means of torturing slaves and non-citizens, and later in special cases, as in 356 BC, when it was applied to gain a confession from Herostratus, an arsonist who was later executed for burning down the Temple of Artemis at Ephesus, one of the Seven Wonders of the Ancient World.[1] Arrian's Anabasis of Alexander states that Alexander the Great had the pages who conspired to assassinate him, along with their mentor, his court historian Callisthenes, tortured on the rack in 328 BC.[2]