St. Patrick’s Pur­ga­to­ry, more com­mon­ly referred to as Lough Derg because of its loca­tion in the lake of the same name in Co Done­gal, is a pil­grim­age site which dates back to the Fifth Cen­tu­ry. Since then, unin­ter­rupt­ed for over 1500 years, it has been a place of Chris­t­ian pil­grim­age and prayer. The pil­grim­age takes place on Sta­tion Island, and it has St. Patrick as its patron. The orig­i­nal monastery on Saints Island in the same lake claimed St Davog, one of Patrick’s dis­ci­ples, as its founder abbot.