 With time, Ostrogski assembled a significant group of professors, many of them having been expelled from the Jagiellonian University (such as the first dean of astronomy Jan Latosz) or having quarreled with the king or the Catholic clergy.However, the political nature of the conflict between Ostrogski, Protestants and Catholics prevented the school from attracting enough professors of international fame.It did however invite numerous Greek scientists from abroad, including Smotrycki's successor Kyrillos Lukaris, as well as Metropolitan bishop Kizikos, Nicefor Parasios, the envoy of the Metropolitan of Constantinople, and Emmanuel Achilleos, a religious writer.