| Up to 4000 BCE |
Mesolithic Period: Hunters and gatherers. |
| 4000 BCE |
Approximate date of first documented Proto-Indo European culture ,which is believed Druidic, near the Black Sea circa. |
| 4000-1800 BCE |
Neolithic Period: Construction of Callanish, and other megalithic monuments. First farmers |
| 3500 BCE |
Construction of Newgrange which is the largest megolithic monument in Europe. |
| 1800-1600 BCE |
The Bronze Age. |
| 1000 BCE |
Evidence of a Proto-Celtic Unetice or Urnfield culture in Slovakia circa. The Iron Age. |
| 900-500 BCE |
Hallstat Period. (Rise of the Celts) |
| 800 BCE |
Proto-Celtic Tribes formed to create the Celtic culture circa. |
| 500-15 BCE |
La Tene Period. (Heroic age of the Celts, and the time of mythology) |
| 450 BCE |
Celts expanded into Spain. Anglo-Saxon invasion. |
| 400 BCE |
The Celts had nomadically migrated into northern Italy. |
| 390 BCE |
Celts invaded Rome |
| 279 BCE |
Celts invaded Greece |
| 270 BCE |
Celts had moved in to Galatia (Central Turkey). |
| 200 BCE |
They had occupied the British Isles, Brittany, modern France, Netherlands, Belgium, Germany, and Switzerland. |
| 82 BCE |
Rome defeats Celts in Italy. |
| 55 BCE |
Julius Ceasar of Rome invaded the Celtic Britian. |
| 52 BCE |
Julius Ceasar defeats Celts in Gaul. |
| 43-409 CE |
Romano-British Era: Rome controls most of Britian and Wales. |
| 61 CE |
Rome attacks Anglesey and destroys Druid Monestaries. |
