Langdon and Sienna seek out a copy of the Divine Comedy to look up Busoni’s clue and eventually locate a small chapel nearby known as the Church of Dante. The man in the Plume Paris sunglasses continues to follow them.

On the Mendacium, the provost recalls his primary objective had been to protect Zobrist from Sinskey, but he had failed to do so, and Zobrist had died by suicide rather than face capture by Sinskey. The provost recalls Knowlton’s concerns about Zobrist’s video and realizes he must make a decision.

Langdon and Sienna enter the Church of Dante, which is also the final resting place of Beatrice Portinari, the unrequited love of Dante’s life. Her grave is now a mecca for Dante fans and star-crossed lovers. Langdon borrows an elderly woman’s smartphone and uses it to search the Internet for the correct canto. He finds a passage about Dante’s ”baptismal font” (230). Langdon suddenly realizes he knows where this font is and tells Sienna they must go to the Gates of Paradise.

Langdon and Sienna make their way to the Piazza del Duomo, the square against which sits the famous Il Duomo. Langdon leads them to another building nearby, the Baptistry of San Giovanni, an octagonal structure that Langdon notes would be the architectural toast of any site were it not placed next to Il Duomo.