Nuraghe Santu Antine, Sardinia, Italy Stock Image

It was built between the Middle Bronze Age 16th century and the Iron Age 9th century BC. It is very large and is made of huge, perfectly shaped basalt blocks which gradually get smaller from the base towards the top of the building. Its masonry is entirely of dry stone. Its central tower is 17 metres high and has a diameter of 15 metres. It originally had three floors and is protected by a trilobed bastion with three towers. The entrance leads to a passageway where there is a corridor that runs around the rooms and is lit up via nine slits positioned at a regular distance from each other.