The story of St Teilo is ultimately a testament to the fact that faith and culture are not bound by borders. By establishing a spiritual bridge between Wales and Brittany, Teilo ensured that the "Llan" tradition was not just a local phenomenon, but a European one. His seven-year exile in Brittany was not a retreat, but an expansion; he took the seeds of the Welsh church and planted them in Breton soil, where they continue to flourish fifteen centuries later.

On this map, the connection between the Gwendraeth Valley and the granite shores of Dol-de-Bretagne is clear. It is a shared heritage of resilience—a story of a people who, when faced with the "Yellow Plague" and shifting kingdoms, looked to a leader who could navigate both the physical and spiritual worlds. Today, whether in a Welsh mission church or a Breton cathedral, the name of Teilo serves as an enduring link between two nations, bound forever by a sacred geography that refuses to fade.