This squat, solid structure is a survivor from the old monastic settlement. Its name is a misnomer, as it was built in the 10th century and St Colmcille was alive in the 6th century. Experts have suggested that it was used as a scriptorium, a place where monks illuminated books.
The site is usually locked except during summer, but ask at the tourist office about the keys or phone Mrs Carpenter for access.