Canterbury Cathedral has beautiful cloisters. They were rebuilt in the fifteenth century on the site of the eleventh century cloisters built by Archbishop Lanfranc (c. 1005–1089) for Christ Church Canterbury. Lanfranc was born in Pavia (Italy) and brought to England by William the Conqueror. A water system was installed and a plan of the cloister drawn c1165. ‘This is a bird’s-eye view of the entire convent, drawn in accordance with the artistic methods of the time, and exhibiting the cathedral and monastic offices, viewed from the north. The water-courses are minutely shewn, with all their arrangements from the source to the convent, and its distribution to the monastic offices, supplying lavatories, cisterns, fish-ponds, etc., and finally flowing, in conjunction with the rain-water from the roofs and the sewerage of the convent, into the town ditch. As the drawing was probably made after the system was completed, we may for convenience assume its date at 1165, two years before the death of Wibert, and five years before the murder of Becket’.