The ancient poplar wood door is "solid and elegant" with well-preserved hinges and a "remarkable" design for holding the boards together, chief archaeologist Niels Bleicher has said.
Using tree rings to determine its age, Bleicher believes the door could have been made in the year 3,063 BC — around the time that construction on Britain's world famous Stonehenge monument began.
"The door is very remarkable because of the way the planks were held together," Bleicher told a news agency.