Chapelle Seinaint Corentin, Ile de Sein

The Ile de Sein was documented by Roman geographer Pomponius Mela in 43 CE as home to nine druidess priestesses. Later, Christian hermits established a community around the freshwater well at Goulenez. The Chapelle Saint-Corentin dates to the tenth century oratory, restored in the 1970s. The nine widows' healing ritual continues today.

Pomponius Mela wrote in 43 CE of the Insula Sena—the Isle of Sena—where nine virgin priestesses called Gallizenae served an oracle and a god whose name he does not record. They could cure the incurable through their knowledge of remedies and rites. They could raise storms at sea. They could take the form of any animal they chose. They practiced perpetual virginity and lived apart from men, though those who sought their counsel could cross the water to consult them.

This is the oldest documented account, but it likely describes a tradition already ancient when the Romans arrived. The Gallizenae belong to the broader context of Celtic female religious specialists—priestesses, seers, and healers whose role in pre-Christian Celtic society left traces across the literature.

Saint Corentin, to whom the chapel is dedicated, was a fifth-century Celtic bishop of Quimper and confessor to King Gradlon of Cornouaille. His legend tells of a miraculous fish from which he ate half each day; the fish regenerated completely each night, providing endless sustenance. This story of divine provision resonates with the holy well's precious freshwater on a salt-swept island.

Medieval tradition sometimes associates the Ile de Sein with Arthurian legend, claiming it as the birthplace of Merlin or Morgan le Fay. Whether this represents genuine tradition or literary elaboration cannot be determined, but it testifies to the island's persistent reputation for supernatural power.