465 BC - Destruction by fire of later structure at Emain Macha, according to radiocarbon dating.
450 BC - Pseudo-historical date for foundation of Emain Macha as capital of Ulaid kingdom, according to 12th century text of Leabhar Gabala.
392 BC-201 BC - Murder of Clonycavan Man, according to radiocarbon dating
362 BC-175 BC - Murder date of Old Croghan Man, according to radiocarbon dating
307 BC-Pseudo-historical date for foundation of Emain Macha as capital of Ulaid kingdom, according to 8th century Irish World Chronicle, Pseudo-historical date for destruction of Dind Rig and foundation of kingdom of Leinster, according to Leabhar Gabala; dated to 300 BC by Orthanach ua Caellama Cuirrig (d.840).
300 BC - Earliest La Tène influences reach Ireland through trade with, and possible migration from, the continent.
200 BC - Bronze and iron being used at a crannog at Rathtinaun, Lough Gara, Co. Sligo, sculptures being made in stone and wood, creation of the Turoe stone, Bullaun, Co. Galway.
First millennium B.C. in Ireland Wikipedia (Text) CC BY-SA
