Although I'm generally in favour of making categories as broad and simple as possible I would have thought Prisoners of the Tower of London was a sufficiently rich set to deserve a category. The Tower of London was a special prison - you pretty much had to have offended the monarch in some way - so the prisoners are virtually all notable. Just off the top of my head it's going to include Sir Walter Raleigh, Sir Thomas More, Anne Boleyn and Guy Fawkes.