Stonehenge construction begins. (jan 1, 3100 BC – jan 1, 3000 BC)
Description:
In its first version, it consisted of a circular ditch and bank, with 56 wooden posts.https://en.wikipedia.org/wiki/Stonehenge
Caroline Alexander, "Stonehenge," National Geographic, June 2008.
Added to timeline:
Date:
jan 1, 3100 BC
jan 1, 3000 BC
~ 100 years