The Domesday Book, a survey of his new kingdom, records how many houses were knocked down to make room but this is the first time their physical remains have been studied.
Cecily Spall, from Field Archaeology Specialists (FAS), said the discoveries, made in the north lawn area, give a glimpse of a revolution in the country.
“The Saxons would not have been able to do anything about this. The Norman Conquest remodelled Anglo Saxon England.
“New landlords were appointed and they laid waste to houses and they reassigned the ownership of property and land rights.”