Numerous historians have termed Cap Corse "the Sacred Promontory" and have gone so far as to suppose the name came from a high concentration of early Christian settlements. This is a folk-etymology. The term comes from the geographer Ptolemy, who called his first and northernmost location on Corsica the hieron achron in ancient Greek, transliterated by the Romans to sacrum promontorium. This is not the only point of land to be so-called; there were many others in the classical world, none of them Christian. The meaning is somewhat ambiguous, whether it was called that because of a temple placed there or whether as the end of the land it was sacred to the god of the sea. If the date of the Geography is taken arbitrarily to be 100 AD, and Ptolemy was working from earlier sources, a Christian association is highly unlikely. There is no evidence that Corsica was converted earlier than the 6th century AD, no evidence of any Christian communities in the area in Ptolemy's time, and the concentration of later Christian edifices is no greater than they are in any populated region of Corsica. Ptolemy's interpretation of promontory also is not clear. It has been taken to mean the entire Cap Corse, the Pointe du Cap Corse, or some one of the small promontories on it. Sometimes it is associated with Macinaggio, but the problem remains unsolved. There is some geographic justification for associating Ptolemy's entire tribe, the Vanacini, which are described as "more to the north", with Cap Corse, as it is a distinct geophysical environment. The Vanacini appear in a bronze tablet found in northern Corsica repeating a letter from the emperor Vespasian to "the magistrates and senators of the Vanacini" written about 72 AD, in Ptolemy's time. The Vanacini had bought some land from Colonia Mariana, a Roman colony in the vicinity of Bastia, and complained about the borders fixed by the procurator from whom they had bought it. The emperor on receiving the complaint appointed another procurator to arbitrate and wrote informing the complainants. The inscription is documentary evidence of the historicity of the Vanacini.
