The actor portraying Moses (in the Biblical epic being filmed by Vittorio De Sica in the desert) has a hairstyle modeled on Michelangelo's renowned sculpture, "Moses"; horns are sculpted into the actor's hair, mimicking the horns in Michelangelo's statue (placed there due to a mistranslation of the Bible, in which the Hebrew word for "rays" was misread as 'horns').
The top floor apartment where Aldo Vanucci takes a bubble bath and has policemen show up which forces him to hide in a booth (perhaps a WC) on the roof, naked and covered in soap suds, is the same old apartment and building where M. Hulot lives in the film Mon Oncle.