Celtic Christianity refers to a distinctive form of Christianity that developed in the British Isles during the Early Middle Ages.

It emerged among the Celtic peoples of Ireland, Scotland, Wales, Cornwall, and Brittany, and it had unique characteristics that set it apart from the broader Christian traditions of the time.

Key features of Celtic Christianity include:

• Monasticism: Celtic Christianity had a strong monastic tradition. Monasteries, often located in remote and natural settings, played a central role. Monks and nuns lived in close-knit communities, following a monastic rule, and engaging in prayer, manual labor, and study.
• Connection to Nature: Celtic Christians had a deep connection to nature, seeing it as a reflection of the divine. Many of their monastic sites were situated in places of natural beauty, and they often incorporated elements of the natural world into their spirituality.
• Celtic Art and Symbolism: Distinctive forms of art, such as illuminated manuscripts like the Book of Kells, and unique symbols were associated with Celtic Christianity. Knotwork, interlacing patterns, and intricate designs were used to convey spiritual truths.
• Lack of Centralized Authority: Unlike the Roman Catholic Church, which had a centralized authority in Rome, Celtic Christianity operated with a more decentralized structure. Monastic communities and local leaders had a degree of autonomy.
• Missionary Activity: Celtic Christians were active in missionary efforts, spreading Christianity to various parts of Europe. St. Columba, for example, established a monastery on the island of Iona and played a key role in Christianizing Scotland.
• Integration of Pagan Practices: Some aspects of Celtic Christianity integrated elements of pre-Christian Celtic spirituality. This syncretic approach allowed for a smoother transition to Christianity for the Celtic peoples.
• Distinctive Liturgical Practices: Celtic Christians had unique liturgical practices, including a focus on daily prayer, chants, and a liturgical calendar that reflected the agricultural cycles.

It's important to note that Celtic Christianity existed alongside and interacted with other Christian traditions, and its distinct characteristics were gradually integrated into broader Christian practices. Over time, especially with the influence of the Roman Catholic Church, many aspects of Celtic Christianity diminished. However, in recent times, there has been a revival of interest in and appreciation for the distinctive spirituality of Celtic Christianity.