Until the 10th century the Cathedral community lived as the household of the Archbishop. During the 10th century, it became a formal community of Benedictine monks, which continued until the monastery was dissolved by King Henry VIII in 1540.
Augustine’s original building lies beneath the floor of the nave– it was extensively rebuilt and enlarged by the Saxons, and the Cathedral was rebuilt completely by the Normans in 1070 following a major fire. There have been many additions to the building over the last nine hundred years, but parts of the quire and some of the windows and their stained glass date from the 12th century.
By 1077, Archbishop Lanfranc had rebuilt it as a Norman church, described as “nearly perfect”. A staircase and parts of the North Wall – in the area of the North West transept also called the Martyrdom – remain from that building.