The Prince of Wales told two pupils on a school visit today that the monarch he most respects is George III.
Marilyn Goncalves, 14, and Joshua Ashworth, 14, quizzed The Prince during his visit to Pimlico Academy, London.
The pair were picked to help lead His Royal Highness on a tour of the school's classrooms, and used the opportunity to grill him as they entered a history lesson.
Talking after the tour, Marilyn said: "We asked him the question: 'Which monarch do you most respect?' And he said George III, because he thought he was a really good man.
"People thought he was mad, but really [Charles] said that the people misunderstood and that he just had an illness. He thought that he was a really good king."
Joshua added: "He said he also believes that his mother was really important in stabilising Britain throughout many years."
The Prince was visiting Pimlico Academy to celebrate the 10th anniversary of the Prince's Teaching Institute (PTI), which aims to bring together and inspire teachers from secondary state schools.
Past speakers at PTI events have included Sir Tom Stoppard, Simon Schama, Michael Palin, Jools Holland and Stephen Fry.
The Prince met teachers who attended PTI and also those on the Teach First scheme which encourages top graduates to enter state school teaching.
He has been Patron of Teach First since June 2008.
The Prince also listened to the school's steel drum band play Vibes Cyah Done by Machel Montano and Do I Do by Stevie Wonder, to which he could be seen tapping his feet and nodding his head. Later he got a chance to play the steel drum himself as he hit some chords under the guidance of one of the pupils.