The only Platonic work known to western scholarship was "Timaeus", until translations were made after the fall of Constantinople, which occurred during 1453. George Gemistos Plethon brought Plato's original writings from Constantinople in the century of its fall. It is believed that Plethon passed a copy of the "Dialogues" to Cosimo de' Medici when in 1438 the Council of Ferrara, called to unify the Greek and Latin Churches, was adjourned to Florence, where Plethon then lectured on the relation and differences of Plato and Aristotle, and fired Cosimo with his enthusiasm; Cosimo would supply Marsilio Ficino with Plato's text for translation to Latin. During the early Islamic era, Persian and Arab scholars translated much of Plato into Arabic and wrote commentaries and interpretations on Plato's, Aristotle's and other Platonist philosophers' works (see Al-Farabi, Avicenna, Averroes, Hunayn ibn Ishaq). Many of these commentaries on Plato were translated from Arabic into Latin and as such influenced Medieval scholastic philosophers.