His guy does not know jack about history.
William the Conqueror invaded England in 1066. 2022-1200 = 822 so he is off by over 250 years at best. Not to mention the fact that many different families have ruled England since William killed the last Saxon King Harold.
The first monarchy began in 1200
True William replaced them, but it was already under the control of a monarchy, all that happened was a new family took over a get the invasion. They assumed all that belonged to the prior ones
New owner same place