England, Wiltshire – Stonhenge

Archaeologists believe that Stonehenge was constructed in several phases from around 3100 BC to 1600 BC, with the circle of large sarsen stones placed between 2600 BC and 2400 BC. The surrounding circular earth bank and ditch, which constitute the earliest phase of the monument, have been dated to about 3100 BC. Radiocarbon dating suggests that the bluestones were given their current positions between 2400 and 2200 BC,^[3] although they may have been at the site as early as 3000 BC.