The medieval walls associated with Archbishop’s Palace, Canterbury were excavated during an archaeological evaluation. Many of the wall structures are thought to relate to the archiepiscopal palace of Archbishop Lanfranc and the cellarer’s range of the priory. Another range of wall dating to the late medieval/post-medieval period was also excavated at the site.

The walls associated with Archbishop Lanfranc's palace included an E-W aligned wall around 0.2m below the ground surface, surviving to a height of 0.25m and measuring 0.5m in width. The wall's fabric was composed of ""chalk, Caen stone fragments and flint nodules, bonded with a pale brown sandy mortar containing small flint inclusions"" (from the original report (1)). The north face of the wall was ""rendered with a base layer (arriccio) of coarse pale grey mortar measuring up to 0.02m thick, which was overlain with a layer of fine white plaster up to 0.01m thick. To the north and abutting the face of wall was a deposit of loose pale brown mortar containing flint nodule and rare red brick fragments, possibly a demolition horizon""(from the original report (1)).
Another section of the wall was located at a depth of 0.55m below the ground surface; the wall survived to a height of 0.55m and was constructed of large blocks of dressed (possibly Reigate) stone, hard mortar with chalk inclusions. The wall was aligned E-W with four courses still surviving.
Two other small fragments of wall masonry were uncovered; these were located at a depth of 0.72m below the ground surface and stood to a height of 0.30m. The wall fragments were constructed from flint nodules and mortar. Their alignment was unclear, however, it is likely that they were aligned E-W. These features were sealed by a deposit which potentially represented a demolition horizon.

Finds from the site include medieval/post-medieval peg-tile and brick, however, these were not associated with the medieval features. (1)

<1> Canterbury Archaeological Trust Ltd, 2016, Archbishop’s Palace, Canterbury, Kent Wall rebuilding works Archaeological evaluation (Unpublished document). SKE52680.