The Tristan Stone stands beside the road into Fowey, a weathered granite shaft carrying one of Cornwall’s most evocative early Christian inscriptions. Known over time as the Longstone, Castle Dore Stone, Cunomorus Stone, and now most commonly the Tristan Stone, it has survived with remarkable clarity. Its Latin inscription, usually read as “Drustanus lies here, son of Cunomorus”, has drawn the attention of antiquaries for centuries, not only because of its age, but because of the names it may preserve. The stone is thought to have begun life as an early Christian memorial, probably dating somewhere between the fifth and eleventh centuries. On one face is the inscription, cut in two vertical lines, while the opposite face carries a rare relief Tau cross, a T shaped Christian symbol. At some later point, a socket was cut into the top of the stone to hold a cross head, changing it from a memorial into a wayside cross. Even without its head, it still speaks of the long life of old routes, sacred markers, and Cornish places where memory gathered by the roadside. Its fame rests partly on the possibility that Drustanus and Cunomorus may be remembered in later legend as Tristan and King Mark. With Castle Dore lying nearby, some have linked the stone to the world of Tristan and Iseult, the doomed lovers whose story passed through medieval romance, poetry, and music. Certainty remains out of reach, but that is part of the stone’s power. It stands at the meeting point of inscription, landscape, and legend, where an early medieval name carved into granite may have grown into one of Europe’s great tragic love stories. The Tristan Stone has not been left undisturbed. It has been moved more than once, and in recent years its relocation for development provoked anger from those who saw the act as a wound to Cornwall’s cultural inheritance. That feeling has deep roots. Carew’s seventeenth century account tells of treasure seekers trying to dig beneath the stone by moonlight, only to be driven away by storm, thunder, and fear. It is a familiar Cornish warning: disturb the old stones at your peril.