Here's why:
* Epic Scope: The poem is an epic journey through Hell, Purgatory, and Paradise, exploring themes of sin, redemption, and divine justice.
* Literary Innovation: Dante's use of the vernacular Italian language, rather than Latin, was a revolutionary act that helped establish Italian as a literary language.
* Influence: The Divine Comedy had a profound influence on Western literature, art, and thought, and continues to be studied and admired today.
Other Renaissance literary masterpieces include:
* The Prince by Niccolò Machiavelli
* Don Quixote by Miguel de Cervantes
* Hamlet by William Shakespeare
* The Book of the Courtier by Baldassare Castiglione
Ultimately, choosing "one" masterpiece is subjective, but The Divine Comedy stands as a towering achievement of the Renaissance era.