Brunelleschi

Brunelleschi was a doctor stationed in Rome in the early 16th century.

History
After being poisoned, the Assassin Ezio Auditore da Firenze carried Pietro Rossi to Brunelleschi's stand located just outside the Colosseo. Brunelleschi realized Pietro had been poisoned with cantarella, after witnessing its effects on his other patients. Brunelleschi gave Pietro a "pretty effective antidote", stating that leeches would lead to a full recovery.

Reference

 * Assassin's Creed: Brotherhood