Roman Arch
Rome, 400 BC - AD 200 - stone
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Roman Aqueduct
Rome, 80AD - stone
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The Colosseum
Rome, 80AD - stone and wood
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Pantheon
Rome, 118 - 126 AD - masonry
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Archimedes' Hydralic Screw
Greece, 200's BC - wood
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Plumbing Valve
Rome, 1st Century AD - bronze and lead
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Catapult (Trebuchet)
Greece, 399 BC - wood
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Crossbow
Europe, 1200 - wood and iron
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