Final answer:
Dante Alighieri is the Italian author who wrote the Divine Comedy, depicted in Domenico di Michelino's fresco. The artwork visually represents Dante's journey through Hell, Purgatory, and Paradise with Florence and other divine realms illustrated.
Step-by-step explanation:
The Italian author who wrote the Divine Comedy is Dante Alighieri. A masterpiece of world literature, the Divine Comedy is an epic poem that provides a vivid journey through the three realms of the dead: Hell, Purgatory, and Paradise. Domenico di Michelino's fresco 'Dante and the Divine Comedy' gives a visual representation of this journey with Dante holding the book and gesturing towards scenes from his poem. Michelino's work shows Florence, the mortal realm, on one side, with other realms like the heavenly steps and Satan's domain, illustrating the divine narrative. Michelangelo, another significant figure mentioned in the context, was a renowned artist and poet of the Italian Renaissance, often called 'il divino' for his superhuman creations.