3400s
3300s
3200s
3100s
3000s
3500 Guadiana megalith Ireland
3400 Newgrange Megalith in Ireland
3400 Megalith in Sweden
3400 Megalith in Denmark
3200 Newgrange Ireland
3180 - 2500 Skara Brae
3100 1st work on Stonehenge, England begins