Third edition, revised and corrected, of a table summary overview to study Dante's Divine Comedy, by Giuseppe Villivà. The table was published on three sheets in the form of posters, one for each one of the parts (canticles) of the epic poem, Inferno (Hell), Purgatorio (Purgatory), and Paradiso (Paradise). This document correspond to the edition printed by Fata Morgana in 1934. Giuseppe Villivà (1807-1864), was a priest (abbot) and philosopher, who had the reputation of a talented teacher.He was tutor to the children of Ferdinand II and taught philosophy at the University of Naples. This is the sheet dedicated to the study of Purgatorio.