But only small parts of the cloister survive, because it was turned into a barracks by the Elizabethans in 1592, and the Cromwellians who besieged it in 1645 and executed the remaining monks within. This, along with possible later stone quarrying, ensured that little survives. Despite this, the ruins are impressive, dominated by a squat square tower that was added above the crossing sometime in the thirteenth century. The church adheres to the Cistercian canon in having a nave with side aisles, a transept to the north and south of the crossing, each with a pair of chapels in the east wall, and a chancel, whose original windows were replaced in the thirteenth century. The design was influenced by styles from Burgundy, from whence the Cistercians came to Ireland, but much of the detailing of the nave and particularly the cylindrical piers of the south arcade has strong echoes of the West of England. The decorated corbels and capitals belonging to them were probably carved by local masons, some of them members of the so-called ‘School of the West’, creating some of the most inventive architectural sculpture of the early thirteenth century in the West of Ireland.