Stonehenge construction begins. (1 gen 3100 anni a. C. – 1 gen 3000 anni a. C.)
Descrizione:
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.
Aggiunto al nastro di tempo:
Data:
1 gen 3100 anni a. C.
1 gen 3000 anni a. C.
~ 100 years
Geo-marchi: