According to one legend, Cainnech of Aghaboe saw a number of demons flying past and when he inquired of their errand, one of them told him that Crom Dubh had died and they were after collecting his soul.
According to Irish legend, St. Patrick came to the headland to confront Crom Dubh, who is variously identified as a pagan chieftain, god, pirate, or robber.
The site of Downpatrick Head became an important place of ritual and pilgrimage during the Festival of Lughnasadh - similar to Croagh Patrick.
[3] According to another local folktale, Crom Dubh was a servant of St. Patrick who gathered wood for the Saint to cook food for the needy.
The Altóir na Greine was destroyed by a farmer in the 1800s to build a wall, and the stones were later reused for construction projects.