Terrific presentation--love the humour here. This lecture would have been apex if, when alluding to Botticelli's style, the now-cliched buzz word 'brand' had been omitted. The man was a capital A Artist, and not churning out disegni for the lire.
Just couldn't resist taking a shot could you? A little bit of knowledge wielded intemperately makes you appear rather egregiously obnoxious . . . If that was your intention you succeeded magnificently.