Three archeological ages (see Wikipedia)
The three-age system is the periodization of human prehistory into three consecutive time periods, named for their respective predominant tool-making technologies. I summarize for my own use the most relevant attributes. The dates are indicative, they can vary thousands of years depending on region and authors. I have only included cultures that are of interest to me.
Halstatt A and B (Late Bronze) 12-8th centuries BC
Halstatt C and D (8-6th centuries BC)