Contemporary times are not reserved for difficult speeches, especially those that might upset the modern man of the 21st century. Every theological, religious, moral or eschatological speech is mysterious and unattractive. Talking about purgatory is extremely difficult because of the disbelief, even among Catholic believers, in that state after death. Modern man is satisfied by earthly delights, until he sees himself as an eternal being whose soul will continue to live after the death of the body. Many theologians spoke about the last, eschatological things, but through this thesis the goal is to connect other sciences and disciplines, like literature and art, with Catholicism and apologetic efforts to point out Catholic dogmas. The Italian poet Dante of the 13th century, through his work Divine Comedy, pointed out the importance of believing in Hell, Purgatory and Paradise. Dante himself emphasizes that he adheres to Catholic dogmas and his thought is based on them, but everything is impregnated with poetic and artistic freedom. The topic of Purgatory and his work on it will be discussed. The work, therefore, aims to present Dante's Divine Comedy, with an emphasis on the canticle about Purgatory. Dante's interpretation of Purgatory through the seven circles is connected to the seven cardinal sins. It will begin with a general presentation of Dante, then elaborate the circles of Purgatory with the help of the interpretation of the seven cardinal sins, in order to reach a conclusion and compare Dante with the Catholic doctrine of Purgatory itself. The purpose is to point out the importance of connecting all kinds of disciplines that help in the Catholic understanding, interpretation and explanation of the dogmas of faith, in this case it is about Purgatory.