Artognou stone

It was discovered in 1998 in securely dated sixth-century contexts among the ruins at Tintagel Castle in Cornwall, a secular, high status settlement of sub-Roman Britain.

Below this and to the left, but overlapping it slightly, is a smaller, more lightly incised inscription in Latin, reading: PATERN[--] COLI AVI FICIT ARTOGNOU.

[citation needed] The inscription has been translated by the Celtic Inscribed Stones Project as "Artognou descendant of Patern[us] Colus made (this).

[3][4] Also found in the sixth-century fort at Tintagel were numerous remains of expensive pottery, glasswork, and coins from Visigothic Spain and the Byzantine Empire (when excavated in the 1930s by C. A. Ralegh Radford).

However, the Celticist John Koch and other scholars have rejected this idea, arguing against the connection between the names and saying there is no reason to suspect an association with an historical Arthur.