A Cistercian monastery consisted of certain invariable structures arranged according to a prescribed plan. St. Stephen’s Abbey of Citeaux, St. Bernard’s Abbey of Clairvaux, determined all other abbeys of the order. At the heart of the abbey was the cloister, an open square of green, on whose four sides stood the essential monastic houses. On the north was the church; on the east was the chapter-house, with a book-room on one side and a parlour on the other, and the dormitory in the second storey over all; on the south was the refectory, with the warming-room on one side, and the kitchen on the other; on the west was the store-house, having over it the dormitory of the lay brethren. Outside of this cloister group, wherever it was most convenient, stood an infirmary, and a guest-house, and whatever barns and mills and workshops were needed for the maintenance of the conventual life. During the administration of the first two abbots--Richard (1132-1139), who had been the prior at York, and Richard (1139-1143), who had been the sacrist--these buildings were erected, part of wood and part of stone. The architect was Geoffrey of Clairvaux, whom St. Bernard had sent to instruct the monks at their entrance into the Order. The stone came from the steep banks of the valley. The labourers were the monks themselves, assisted by their neighbours, some of whom were hired, while others gave their day’s work as an investment in the securities of heaven. It is interesting to find that the little company of poor monks, rich in faith, laid out the foundations of their church upon the great lines on which it stands to-day. Other generations built the chapel of the nine altars and raised the noble tower, but the vast nave with its transepts was both planned and completed by the men who began the monastery. These large proportions did not necessarily mean that they expected a great number of monks to say their prayers within these wide walls. They were not adjusting the building, after our manner, to the size of the congregation. They were intent upon the glory of God. The church was to be an evidence of their conception of the dignity, the strength, and the splendour of the Christian religion. First, they built the chancel, which was pulled down in the next century and built over again larger and finer. There they probably held their services while the masons and the carpenters were busy with the other work. Then they built the transepts, and the south wall of the nave as high as the sills of the windows; then the lower courses of the west wall. After that, they finished the south wall, because that was on the cloister side; and built its great bays. Then, the north wall, and the rest; roofing it all in. Mr. St. John Hope is of the opinion that the church, passing through these various stages, and waiting at intervals for additions to the building fund, was quite completed before 1147. The west wall of the cloister belongs to the same period.