Stefano da Bagnone

Stefano da Bagnone (1418 - 1479) was one of the Pazzi conspirators who attempted to murder Lorenzo de' Medici. He was a monk and a secretary to Jacopo de Pazzi, and one of the men whom Jacopo hired to kill Lorenzo.

Pazzi conspiracy
In 1478, Stefano met with Templar loyalists in the catacombs under Santa Maria Novella where he gave a blessing to the Templars operation to take control of Florence. The next morning, Stefano was present at the Duomo where he stabbed Lorenzo de' Medici in the neck. After the Pazzi conspiracy failed, Stefano fled to Tuscany.

Death
While in Tuscany, Stefano sought refuge in a monastery, Monte Oliveto Maggiore. While he was there, he was assassinated by Ezio Auditore while trying to convince another monk that God wasn't real.

Final words

 * Bagnone: Now I will see who was right...
 * Ezio: Where is Jacopo?
 * Bagnone: Nothing to fear I suppose... They meet in the shadow of the Roman Gods...
 * Ezio: Ora sei libero dalla paura. (Be free of your fear now.) Requiescat in Pace. (Rest in peace.)

Trivia

 * In real life, Stefano da Bagnone was a priest who tried to kill Lorenzo de' Medici. He found refuge with monks, but was arrested on May 3, 1478. His nose and ears were cut off, and he was hanged from the Palazzo della Signoria tower.
 * He is initially shown to be atheist (by being part of an atheist organization, and by openly claiming that God did not exist), but is actually unsure of the truth (as shown in the final words section above).
 * When Ezio is about to ask the monks in Forlì about Savonarola, they flee from Ezio because he killed Stefano, claiming that "the killer of monks has returned."