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2,000 year old wood that is protruding from the siege ramp at Masada that was built by the Romans.
The "traditional interpretation" is that wood from the vicinity was used. However, scholars from the University of Haifa have suggested that because the area was denuded of wood, that the wood was brought in from other regions of the country (thanks to Todd Bolen for reference to this information).
For a more complete description of the Roman siege of Masada Click Here.