Religion in the Republic of Ireland
The predominant religion in the Republic of Ireland is Christianity, with the largest church being the Roman Catholic Church. The Irish constitution says that the state may not endorse any particular religion and guarantees freedom of religion.
Dun Ailline Druid Brotherhood
The Dun Ailline Druid Brotherhood (also known as Dun Ailline or HDDA, "Hermandad Druida Dun Ailline" in Spanish) is a pagan organization for followers of the Celtic Neopaganism based on Spain in 2010, which supports the practice of a type of Celtic Reconstructionist Paganism called Druidism, centered on the Celtic culture of Ireland, and whose principal deities are known as the Tuatha Dé Danann. Its members consider themselves practitioners of a European native religion and they call themselves "creidim", a concept of Irish origin.