Did Archimedes really burn Roman ships with a massive array of solar mirrors?

Wars & Conflicts · Published 15 October 2026 Swipe more like this →

In short: The legend of Archimedes using a heat ray to incinerate Roman ships during the Siege of Syracuse has captivated thinkers for centuries. While modern experiments have successfully ignited wooden targets using concentrated sunlight, the historical reality remains elusive, leaving scholars to debate whether this weapon was genius or merely myth.

The story of Archimedes using burning-glasses to destroy the Roman fleet during the Siege of Syracuse, which occurred between 213 and 212 BC, lacks any contemporary evidence. The tale does not appear in the inventor's own surviving works, and it only became an established narrative by around 500 AD, when Anthemius of Tralles described such a device. Throughout history, the plausibility of the weapon has been heavily contested. René Descartes dismissed the account as false, while others, such as Comte de Buffon in 1747 and John Scott in 1867, conducted their own investigations into the physics of concentrated light.

Modern attempts to replicate the feat have yielded mixed results. In 1973, Ioannis Sakkas used 70 copper-coated mirrors to ignite a tar-painted plywood ship at a distance of 160 feet. Conversely, experiments by MIT students and the television show MythBusters have struggled to achieve consistent combustion. In 2005, MIT researchers managed to ignite a stationary wooden ship, but only after ten minutes of cloudless, ideal weather. Later tests, including a large-scale attempt in 2010 involving 500 participants, failed to reach the 210 °C necessary to set a ship's sail on fire, leading the show to categorize the weapon as busted.

Critics of the heat ray theory argue that even if the physics were possible, the tactical requirements would be extreme. The Roman fleet would have needed to remain stationary, and the attack would have had to occur during the morning to optimize light collection, as Syracuse faces east. Furthermore, experts suggest that simpler methods, such as flaming arrows or catapult-launched bolts, would have been far more efficient for setting ships ablaze. Ultimately, many researchers conclude that if mirrors were used at all, their primary effect was likely the blinding or distraction of the Roman crew rather than the destruction of their vessels.

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