The Pope is first of all the pastor of the Church and sign of its unity. He can be a theologian professionally, or he cannot be, as it has happened for the majority of popes. ln both cases, in his teaching as well as in the choices he makes or in the orientations he offers, his teaching and his style are imbued with a theological perspective and ask theologians to confront with them. The collection "Pope Francis' Theology", calling upon the expertise of eleven theologians from various Countries of the world, aims at showing us what theology is at the base of such incisive words and such simple gestures with which Pope Francis has made us so familiar. They are eleven easy volumes, written in a captivating way yet able to show in a rigorous way the deep roots of his thought and action.