Skilled miners
and metal workers appear in Ireland, leaving a legacy of chambered graves, standing stones
and markers--believed to have a significance in astronomy.
B.C. 500
Celts invade Ireland
With the Celts
came a highly organized social structure, comprising three classes of people: warriors,
artisans and slaves. Every clan had its own king, who was governed by the High King at
Tara.
B.C. 400
Celtic expansion in Europe
The Celts can
be found throughout Europe--even in Greece ("Keltoi").
B.C. 390
Celts attack Rome
The Celts are
believed to have sacked and overtaken Rome.