Applecross Abbey: founded by Saint Maelrubh.

Monastery of Lismore: founded by fifth century saint.

Iona (Scotland): Monastery built by Saint Columba, towards 560. Most significant religious settlement of middle ages in Islands of Scotland.

Dyndad and Whithorn (Scotland): First Christian site in Scotland founded by St. Ninian about year 400. One can discover there the ruins of a fifth century vault. The village has a small museum where finds are displayed.

Derry (Ireland): Monastery founded by St.Columba before his exile to the Kindom of Dalriada, in Scotland.

Inismurray (Ireland): Monastery founded by St.Molaise in the seventh Century. There are some ruins remaining.

Inisboffin (Ireland): Monastery founded by Saint Morioc. There are the remains of a hut in the characteristic shape of a hive. There also remain traces of the hermitage of Saint Colman.

Aran Mor (Ireland): Vestiges of the seven churches of the seven saints of the Islands of Aran dating from the sixth and seventh centuries.

Ruins of hermitage founded by Saint Enda.

Iniscathy (Ireland): Monastic foundation erected in the sixth century.

Oratory of Gallerus (Ireland): Ruins dating from the eighth or ninth centuries. Undoubtedly the remains of an old hermitage.

Skellig Michael (Ireland): Monastery founded by the monks brought there by Saint Finian in the seventh century. Perched on a 300 metre high cliff. Composed of a church with two oratories and six cells in the shape of hives.

Wexford (Ireland): Significant religious centre as of the sixth century. It was one of the bridgeheads of the migrations to Europe via Wales, Cornwall and Brittany.

Caldy Island (Wales) : Formerly Ynis Byr. Another significant Welsh monastic site.

Llandilldut – Fawr (Wales): Today llanwit Major, highlight of Welsh monasticism founded by Saint Ildut in fifth century on the southern coast of the county of Glamorgan. Saint Ildut later emigrated to Brittany to found a monastery on the site of a village which still bears the name Landildut.

Coast of Cornwall, Scilly Isles: No major site. But we know that these coasts were evangelised and inhabited by monks from Wales and that they constituted a significant stage on the road to Brittany.

Islands of Ushant (Brittany): A meeting place for the migrating monks from Ireland and Wales, via Cornwall. The island would have sheltered a small community of anchorites. Logical road for coastal traffic to British Cornwall. In his Life of the Saints Albert le Grand says this in connection with Ushant: "...And having crossed the British Ocean they approached the island of Eussa...they drew their vessel on to dry land and finding the place deserted and well suited to their intentions, built there a small, tidy monastery with a vault and thirteen small cells..."

Monastery of Landevennec (Brittany ): founded by Saint Gwenole in seventh century and is a legendary outpost of Celtic Christianity.