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Most Iron Age archaeological sites only reveal a small part of what was there originally because organic material such as wood, leather, rope and thatching reed usually rot away very quickly under most conditions. Even when the walls of roundhouses were made from stone, little more than the foundations survive, usually because building stone would be reused once the roundhouse was abandoned. Experimental archaeological techniques can speculate on how roundhouses were constructed during the Iron Age. Sit back and watch archaeology come to life.