An Tuatha Dé Danann

The Tuatha Dé Danann came from four cities to the ancient west and north of Ireland — Falias, Gorias, Murias and Finias — where they taught their skills in the sciences, including architecture, the arts, and magic, including necromancy.

According to Lebor Gabála Érenn, they made their presence known to the people of Ireland “in dark clouds” and “landed on the mountains of [the] Conmaicne Rein in Connachta”, otherwise Sliabh an Iarainn, “and they brought a darkness over the sun for three days and three nights”.

It is said that, like Alexander the Macedonian, they burnt their ships “so that they should not think of retreating to them, and the smoke and the mist that came from the vessels filled the neighbouring land and air. Therefore it was conceived that they had arrived in clouds of mist”.