The music during the opening credits is "Aria da Capo" from Johann Sebastian Bach's Goldberg Variations, as being played by Glenn Gould, a tape of which was playing while Lecter killed the two guards in Tennessee in The Silence of the Lambs (1991).
In Florence, where part of the movie was shot, it is possible to buy a sort of tourist guide called: "Hannibal Lecter. Visit the places of the city where he was."