Format: 173 x 245 mm
John and Mila are in Rome with their parents. And, of course, the Vatican is on the tour programme. They have to wait in a long queue at St. Peter’s Square for the Vatican Museums – how boring! But suddenly behind a pillar they discover a little boy in a colourful knight’s costume. And this boy has discovered a secret: behind St. Peter’s there is a hidden city – and he knows how to get there!