Indeed, not only the Incas but, for the same reasons, various peoples have decided to erect their most eminent sanctuary on sacred islands: the Egyptians at Philae; the Greeks at Delos; the Germans at Helgoland in the North Sea and on the island of the goddess Nerthus, in the Baltic; the Celts at Gavrinis, near to the Breton coast in France, at Iona in Scotland, etc. This hypothesis finds a type of confirmation in the poem the Theogony, by the Greek oral poet Hesiod (8th–7th century BC) : "They ruled over the famous Tyrenians, very far off in a recess of the holy islands".