That would happen in The Divine Comedy.
Among his other works, Dante wrote 13 ‘epistles’ to various people of importance. One was addressed to the Italian Cardinals during the conclave of 1314, pleading the cause of the return of the Pope to Rome. The last and most famous of these was to the Lord of Verona, Francesco della Scala (also called Cangrande). In it, Dante declared the title of his major work (The Comedy of Dante Alighieri, Florentine in birth, but not in manners) as well as its very purpose: