While some Celtic Christian practices were changed at the Synod of Whitby, the church in the British Isles was under papal authority from earliest times.

The legend may combine Christian lore with a Celtic myth of a cauldron endowed with special powers.

Most scholars today accept that both Christian and Celtic traditions contributed to the legend's development, though many of the early Celtic-based arguments are largely discredited ( Loomis himself came to reject much of Weston and Nutt's work ).

The general view is that the central theme of the Grail is Christian, even when not explicitly religious, but that much of the setting and imagery of the early romances is drawn from Celtic material.

One British folk / rock band ( 1969 – 2003 ), Lindisfarne, was even named after the island, while a Celtic Christian progressive rock band named after another island, Iona, has a song devoted to Lindisfarne on its album Journey into the Morn ( 1995 ).

He urged Henry to invade Ireland to bring its Celtic Christian Church under the Roman system and to conduct a general reform of governance and society throughout the island.

* The Synod of Cashel ends the Celtic Christian system and brings them under Rome.

Howie, a devout Christian, is appalled to find that the inhabitants of the island practise a form of Celtic paganism.

Howie, a devout and celibate Christian, travels to the island and is profoundly disturbed to find a society that worships the old pagan, Celtic gods of their ancestors.

It remained a lost asteroid for several decades until it was recovered on January 4, 1989, by Christian Pollas, and was named after the Celtic god Toutatis / Teutates — known to popular culture as the God that the cartoon character Astérix's chief Vitalstatistix evokes so that the sky may never fall on his head.

Historically, Europe has always been a mixture of Latin, Slavic, Germanic, Uralic, Celtic, Hellenic, Illyrian, Thracian and other cultures influenced by the importation of Hebraic, Christian, Muslim and other belief systems ; although the continent was supposedly unified by the super-position of Imperial Roman Christianity, it is accepted that geographic and cultural differences continued from antiquity into the modern age.

Some historians think that Asterio held a religious office which combined elements of the pagan and Christian religions, while others think he may be linked to the Brythonic refugees that settled in Britonia ( Galicia ) in the 6th century: The Parrochiale Suevorum ( an administrative document of the Suebi Kingdom ) tells that the lands of Asturias belonged to the Britonian see, and it is a fact that some features of the Celtic Christianity penetrated in Northern Spain, like the Celtic tonsure which was condemned by the Visigoth bishops who assisted to the Fourth Council of Toledo.

Spirals, step patterns, and key patterns are dominant motifs in Celtic art before the Christian influence on the Celts, which began around 450 A. D.

Tolkien's legend of Eärendil has elements resembling the medieval Celtic Immram legends or the Christian legend of St. Brendan the Navigator.

One view, which gained substantial scholarly traction in the 19th century, was that there was a " Celtic Church ", a significantly organized Christian body or denomination uniting the Celtic peoples and separating them from the " Roman " church of continental Europe.

Augustine's version of peregrinatio spread widely throughout the Christian church, but it took two additional unique meanings in Celtic countries.

A focus on monasticism – the sequestered life of monks and nuns – is often given as an example of Celtic Christian practice.

* Celtic Christian traditions in Gwynedd until 1100

Similar euhemerisms of pre-Christian deities can be found in other medieval Celtic literature, when Christian scribes and redactors may have felt uncomfortable writing about the powers of pagan gods.

The story of Dylan reflects ancient Celtic myths that were handed down orally for some generations before being written down during the early Christian period by clerics.

The story as it has been preserved will therefore exhibit elements and archetypes characteristic of both Celtic pagan and Christian mythologies.

There may have been a Celtic Christian church called ' Lanprobi ' at the site, and Kenwalc or Cenwalh, King of the West Saxons is believed to be one of its founders.

The original church is no longer extant, but a standing Celtic cross testifies to the presence of Christian worship at the site in pre-Norman times.

Historically, in some Celtic monasteries abbesses presided over joint-houses of monks and nuns, the most famous example being Saint Brigid of Kildare's leadership in the founding of the monastery at Kildare in Ireland.

In the following century an Irish missionary Columba would found a monastery, on Iona, and introduce the previously pagan Scotti to Celtic Christianity, and with less success the Picts of Pictland.

Major excavations beginning with C. A. Ralegh Radford's work in the 1930s on and around the site of the 12th century castle have revealed that Tintagel headland was the site of a high status Celtic monastery ( according to Ralegh Radford ) or a princely fortress / trading settlement dating to the 5th and 6th centuries ( according to later excavators ), in the period immediately following the withdrawal of the Romans from Britain.

The name means " monastery or large church by the River Axe " and is a mixture of languages ; the river name Axe has Celtic origins and mynster is an Old English word.

The “ Ionan ” practice was that of the Irish monks who resided in a monastery on the isle of Iona ( a tradition within " Celtic Christianity "), whereas the “ Roman ” tradition kept observances according to the customs of Rome.

Another place of medieval pilgrimage in Norway is the island of Selja on the northwest coast, with its memories of Saint Sunniva and its three monastery churches with evidently Celtic tradition similar to Skellig Michael.

This meeting of the ecclesiastics with Roman customs and local bishops following Celtic ecclesiastical customs was summoned in 664 at Saint Hilda's double monastery of Streonshalh ( Streanæshalch ), later called Whitby Abbey.

In 635, a centre of Celtic Christianity was established at Lindisfarne, Northumbria, where St Aidan founded a monastery.

This fertile, low-lying island was once a major centre of Celtic Christianity, with a monastery founded by Saint Moluag and the seat of the Bishop of Argyll.

The double monastery of Celtic monks and nuns was home to the great Northumbrian poet Caedmon.

About 550, a Celtic monastery was founded on St Patrick's Isle.

The only major fact that Bede gives about Chad's early life is that he was a student of Aidan at the Celtic monastery at Lindisfarne.

However, the city is believed to have developed around a sixth century Celtic monastery founded by Saint Kentigern, and is now home to the small fourteenth century St Asaph Cathedral.

During the fifth century the island became a refuge for persecuted Christians, and a small Celtic monastery existed.

A Celtic monastery was founded on the island in the sixth century, and a Benedictine foundation existed from 1136 until the dissolution of the monasteries in 1536.

This site was a Celtic monastery in the 5th century with the church being established in the 11th century.

A curious undated inscription can be found on a tombstone in St Michael's parish church ( built on the site of a ' class ' or Celtic monastery ).

Because of its monastery and teaching centre it became a major centre for education and Celtic Church evangelism, attracting scholars from across Wales, Devon, Cornwall and Brittany and the wider world.

The prominent round tower was originally part of the Celtic monastery, but has had battlements added at a later date.

Archaeological evidence shows that her monastery was in the Celtic style, with its members living in small houses, each for two or three people.

For reasons not completely understood, the Celtic bell believed to have been used at the monastery is not preserved in the cathedral.

The fixing of the see here shows that the Celtic monastery was already of great importance.

A well-preserved bronze ' Celtic ' hand bell formerly kept in the church of the parish of Little Dunkeld on the south bank of the River Tay opposite Dunkeld, may also survive from the early monastery ( replica in Cathedral Museum ).

Bede mentions Bosham in his book The Ecclesiastical History of the English Nation, speaking of St Wilfred's visit here in 681 when he encountered a Celtic monk, Dicul, and five disciples in a small monastery.