It is best known for its Gaelic monastery, founded between the 6th and 8th centuries, and its variety of inhabiting species, which include gannets, puffins, a colony of razorbills and a population of approximately fifty grey seals.[3] The island is of especial interest to archaeologists, as the monastic settlement is in unusually good condition. The rock contains the remains of a tower house, a megalithic stone row and a cross-inscribed slab known as the Wailing Woman. The monastery is situated at an elevation of 170 to 180 m (550 to 600 ft), Christ's Saddle at 129 m (422 ft), and the flagstaff area at 37 m (120 ft) above sea level.[4]