Effigies of bishops fill the four Decorated arched recesses on the south wall of the =south-choir-aisle= and on the north wall, under an arch opening to the choir, is the tomb of =Bishop De Lorraine=, or =Losinga= (died 1095). Here is also the monument and tomb to =Bishop Mayhew=, of Magdalen College (1504-1516); some old windows restored by Warrington; and the famous =Map of the World=, one of the most valuable relics of mediæval geography in existence. It was designed about 1314 by Richard of Haldingham, a Lincolnshire monk. It was discovered more than a hundred years ago under the floor of Bishop Audley’s Chapel. The =South-east-transept=, between the retro-choir and the chapter-house, opens into the latter. The style is in the main Decorated, though the window tracery is later quite Flamboyant. One single octagonal pillar separates it from its eastern aisle. From this transept a lovely view of the Lady-Chapel can be enjoyed. The peculiar darkness of the =Choir= is due to the arrangement of the transepts, which prevents the admission of light except from the clerestory. “The main arches of the choir are of three orders, and spring from massive composite piers, with broad, square bases. The capitals of the semi-detached shafts are enriched with leafage and grotesque heads. The _triforium_ in each bay consists of one wide Norman arch circumscribing two smaller, divided by a central shaft, and springing on either side from two massive semicircular piers, with small capitals. Both outer and inner arches spring from these piers. The capitals of the central shafts have square abaci, and are enriched. The tympana of the outer arches are covered with scallop, leaf and billet ornament. At the base of the triforium runs a square string-course, enriched with minute carving. The lozenge ornament prevails round the main arches of the choir, as does the zigzag round those of the nave.