A study of the surviving remains of the Cistercian abbey church of Dundrennan, Kirkcudbright, reveals that the monks undertook a massive remodelling of the eastern portions in the late twelfth century. It was largely confined to the east walls of the transepts, the transept chapels, and the crossing, and was intended to give greater height and space by the addition of a third storey. The inspiration for the new ideas was evidently derived from Cistercian houses in the north of England such as Kirkstead, Roche and Byland.