The Pope guiding Christians with the Old and New Testaments (Divine Comedy, Yates Thompson 36) - Giovanni di Paolo
The difference between the spheres explained by Daniel and Nebuchadnezzar (Divine Comedy, Yates Thompson 36) - Giovanni di Paolo
Causes of moon spots: the three mirrors experiment (Divine Comedy, Yates Thompson 36) - Giovanni di Paolo
Beatrice explains the order of the universe to Dante (Divine Comedy, Yates Thompson 36) - Giovanni di Paolo
Beatrice explains to Dante the principles of ecclesiastical dispensation (Dante Paradiso ch5) - Botticelli
Virgil explains to Dante the principle of love and the role of free will (Dante Purg ch18) - Botticelli
