As a humanist Bruni was essential in translating into Latin many works of Greek philosophy and history, such as Aristotle and Procopius. Bruni's translations of Aristotle's "Politics" and "Nicomachean Ethics", as well as the pseudo-Aristotelean "Economics", were widely distributed in manuscript and in print. His use of Aelius Aristides' "Panathenicus (Panegyric to Athens)" to buttress his republican theses in the "Panegyric to the City of Florence" (c. 1401) was instrumental in bringing the Greek historian to the attention of Renaissance political philosophers (see Hans Baron's "The Crisis of the Early Italian Renaissance" for details). He also wrote a short treatise in Greek on the Florentine constitution.