The Book of Kells is widely regarded as Ireland’s finest national treasure.
Newgrange was constructed over 5,000 years ago (about 3,200 B.C.), making it older than Stonehenge in England and the Great Pyramid of Giza in Egypt.
The Tara Brooch is a Celtic brooch / Celtic pin of about 700 AD generally considered to be the most impressive of over 50 elaborate Irish brooches to have been discovered.
In Ireland, it is a popular legend that the Celtic Christian cross was introduced by Saint Patrick.