He died, with "three-fourths" of the men of Ireland about him, on the night of Samhain,[81] while worshipping the idol called Crom Cruach, at Magh Slacht, in Breifne.[82] Tighearnmas reigned seventy-five years.

He is said to have been the first who attempted the smelting of gold in Ireland; and the use of different colours,[83] as an indication of rank, is also attributed to him.
Silver shields were now made (B.C.

1383) at Airget-Ros, by Enna Airgtheach, and four-horse chariots were first used in the time of Roitheachtaigh, who was killed by lightning near the Giant's Causeway.
Ollamh Fodhla (the wise or learned man) distinguished himself still more by instituting triennial assemblies at Tara.

Even should the date given by the Four Masters (1317 B.C.) be called in question, there is no doubt of the fact, which must have occurred some centuries before the Christian era; and this would appear to be the earliest instance of a national convocation or parliament in any country.

Ollamh Fodhla also appointed chieftains over every cantred or hundred, he constructed a rath at Tara, and died there in the fortieth year of his reign.
At the reign of Cimbaoth (B.C.