Hahaha !
That far back , it was only about 500 years ! There r plenty of historical documents and artifacts etc , from this country and the rest of Europe , that give us a very good idea of what went on amongst the nobility . They were mostly well educated , not like the ordinary folk , keeping the peasants illiterate etc was one way of keeping them in their place but most nobles could read and write , we r talking about Shakespeare's time .
Those two books r a very interesting read and based on all the known facts and evidence that we have , diaries , letters , official documents etc .