Celtic: fort of the thorn-bushes

A Cistercian abbey in Kirkcudbrightshire, Scotland, founded in 1142 by King David I and Fergtls, Lord of Galloway, for monks from Rievaulx, Yorkshire. Mary Queen of Scots spent her last night in Scotland there. For centuries after the suppression of the monasteries, the buildings were used as a stone-quarry for houses in the vicinity; since 1842 they have been carefully preserved. The remains include the chapter-house, with a fine arched doorway and octagonal columns, tombs of many abbots and priors, and of Alan, Lord of Galloway (c.1250).