Take from Wikipedia: Waltham Abbey was founded in 1030 and a building was constructed on the site by Harold Godwinson (aka King Harold II). In 1177 the abbey was refounded as an Augustinian foundation. At this point extensive additional building works were carried out, although the nature and extent of these still await detailed research. The rebuilding, in the Early English style, made the abbey far more extensive than the original Norman establishment, as can be seen today from traces in the abbey grounds.
The Augustinian abbey was a popular place for overnight stays with kings and other notables who were hunting in Waltham Forest. It was the last abbey in England to be dissolved, in 1540. Thomas Tallis was the last organist at the Abbey prior to its dissolution. Henry VIII suggested Waltham as one of the new cathedrals for the Church of England, but the proposal was not implemented.