The Cloister occupies a large open space, bounded on the south, east, and west by the various monastic buildings, and on the north by the cathedral itself. The existing cloister was commenced during the time of Bishop Skirlaw (1388 to 1406), and was completed by Cardinal Langley (who held the see from 1406 till 1438), probably in the earlier part of his episcopate. The contracts (the first dated 1398) for building the cloister are still preserved in the treasury. We are indebted to Bishop Skirlaw for their very existence, as it is recorded that he contributed sums of money for this purpose, both during his life and by his will. The cloister, as seen to-day, has been very much altered and restored, and probably the only original feature remaining is the fine oaken ceiling. This is panelled, and moulded, and decorated with shields, upon which are painted and gilded various coats of arms. In the centre of the cloister garth are the remains of what was the monks' lavatory. It was erected in the years 1432 and 1433, and was of octagonal shape. Some of the stone for its construction was brought from Egglestone-on-Tees, on payment of rent to the abbot of that place to quarry it. It is said to have had twenty-four brass spouts, seven windows, and in its upper storey a dovecote, the roof of which was covered with lead.

There is no doubt that there was a cloister attached to the monastery in its early days, but of this no trace remains. It is also probable that one was erected by Bishop Pudsey, though this also has entirely vanished, unless (as suggested by Canon Greenwell) some marks of a lean-to roof on the north and east walls may be traces of its presence. In the western alley of the cloister is the old treasury, rich in records, and the vestries for canons, king's scholars, and choristers. The alley opens at the end into what is now called the crypt [(see p. 85)]. This was undoubtedly the common hall of the monks. It is a spacious stone-vaulted chamber. The columns are low and massive, with simple moulded caps, from which the chamfered vaulting ribs diverge. Over the hall or crypt is the dormitory, which for a long time formed part of a residence attached to one of the stalls. It is now, however, used as a library. It occupies the whole of the western side of the cloister, and is 194 feet long. It was originally subdivided, by wooden partitions, into separate sleeping-rooms for each monk. Its massive roof of oak is worthy of attention, the tree trunks being merely roughly squared with an axe [(see p. 99)].

In the south alley was the refectory and the monks' common dining-hall. The original building is now entirely altered, though there remains beneath it a very early crypt, with plain, short square piers, and a simple quadripartite vault without ribs. Another portion is covered by a wagon-head vault. Whether the original refectory was of similar architectural character it is now impossible to say, as, whatever it may have been, it was removed early in the sixteenth century and rebuilt, and after the dissolution of the monastery was used by the Minor Canons of the church as a common hall. It seems to have fallen into a bad state of repair, and was again entirely reconstructed by Dean Sudbury (1661-1684), who was elected to that office immediately after the Restoration. He converted it into a library, to which use it is still put. The account of this building, given in the "Antiquities of Durham," is of sufficient interest to bear quotation.

"In the South Alley of the Cloysters," says our authority, "is a large Hall, called the Frater-house, finely wainscotted on the North and South sides; and in the West and nether Part thereof, is a long Bench of Stone in Mason-work, from the Cellar Door to the Pantry or Cove Door: Above the Bench is Wainscot Work two Yards and a Half high, finely carved, and set with imboss'd Work in Wainscot, and gilded under the carved Work. Above the Wainscot was a large Picture of our Saviour Christ, the blessed Virgin Mary, and S. John, in fine gilt Work, and most excellent Colours; which Pictures having been washed over with Lime did long appear through it. This Wainscot had engraven on the Top of it, Thomas Castell, Prior, Anno Domini, 1518 Mensis Julij. Whence it is manifest that Prior Castell wainscotted the Frater-house round about.

"Within the Frater-house Door, on the Left Hand at entering, is a strong Almery in the Wall, wherein a great Mazer, called the Grace Cup, stood, which every day served the Monks after Grace, to drink out of round the Table; which cup was finely edged about with Silver, and double Gilt. In the same place were kept many large and great Mazers of the same sort.... Every Monk had his Mazer severally by himself to drink in, and had all other Things that served the whole Convent, and the Frater-house in their daily Service, at their Diet, and at their Table.... At these Times (at meals) the Master observed these wholesom and godly Orders, for the continual instruction of their Youth in Virtue and Learning; that is, one of the Novices appointed by the Master, read some Part of the Old and New Testament in Latin, during Dinner, having a convenient place at the South End of the High Table, within a beautiful Glass Window, encompass'd with Iron, and certain Stone Steps, with Iron Rails to go up to an Iron Desk, whereon lay the Holy Bible....

"This Fabrick retained the Name of the Petty Canons' Hall till Dr Sudbury, Dean of the Cathedral, generously erected a beautiful Library in its Place; but he not living to finish it compleatly, did by (a clause) in his Last Will, bind his Heir, Sir John Sudbury, to the due Execution thereof."

The contents of the library are both numerous and interesting. There are several thousands of volumes, many of them being rare and valuable. Numerous ancient illuminated MSS., among which is a copy of the Gospels of S. Mark, S. Luke, and S. John, written before the year 700; and several books given by Bishops Carileph and Pudsey. Among the latter is a Bible, in four volumes, in its original stamped leather binding. A collection of ancient copes belonging to the cathedral, and the remains of the robes of S. Cuthbert, and other relics taken from his coffin when it was exhumed, in 1827, may also be seen here. Numerous specimens of Roman altars, tablets, and sculptured stones, from various Roman stations in Durham and Northumberland, notably from Hexham, are preserved in this library, which is open to the public on Tuesday and Friday in each week from eleven to one. The room is finely proportioned, and has a magnificent open timber roof.