Archaeological Evidence
Archaeological evidence for catapults, especially torsion devices, is rare. It is easy to see how stones from stone-throwers could survive, but organic sinews and wooden frames quickly deteriorate if left unattended. Usual remains include the all-important washers, as well as other metal supporting pieces, such as counterplates and trigger mechanisms. Still, the first major evidence of ancient or medieval catapults was found in 1912 in Ampurias. It was not until 1968-1969 that new catapult finds were discovered at Gornea and Orşova, then again in 1972 in Hatra, with more frequent discoveries thereafter.
Read more about this topic: Torsion Siege Engine
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