Yuriy Drohobych
He received his primary education in the local parochial school in St. George's Church and then studied at a lyceum in Lviv (Polish: Lwów), or Leopolis, in Ukraine (then Ruthenian Voivodeship of the Kingdom of Poland).
Manfredi introduced Drohobych to German astronomer Johannes Müller (Regiomontanus), who believed in heliocentrism; however, it had not been mathematically proven at that time.
Similar methods were used in teaching both disciplines, the reading and interpretation of Latin translations of Greek and Arab classical authors.
At the beginning of 1481, the student body of the university elected Drohobych the rector of the school of Medicine and Free Arts;[2]: 34 he was only thirty at the time.
For a year, the regular term in office for an elected rector, he combined his academic responsibilities, which included teaching astronomy and medical research, with administrative obligations.
It was customary at that time for professors to have off-site meetings to discuss with students issues that did not fit the official scientific doctrine.
In an early 1478 letter to his friend Mykola Chepel in Poznań, Drohobych mentioned his calculations of planetary positions during a year.
According to his observations and calculations, he estimated the exact time for two lunar eclipses; he also included a chart of the phases of the Moon for a year.
He also gave predictions concerning political events that had been taking place in Europe, Egypt, Turkey, Arabia, and India.
In 1483 Drohobych published in Rome his first book in Latin, Prognostic Estimation of the year 1483 (Iudicium Pronosticon Anni MCCCCLXXXIII Currentis).
[2]: 36 It was a nineteen-page publication of astrological (zodiac) calendars, which were popular at that time, that helped readers to predict events on Earth depending on the planets' positions.
He was the first Eastern European scholar who in a printed publication indicated the exact geographic coordinates of several Ukrainian, Polish, and Lithuanian cities.
One of the most important aspects of this treatise was the author's vision that the world is not an abstract notion and that humans are capable of learning its patterns and laws.
As time went on, he found many followers among Ukrainian scholars and students who studied in Italy and Poland and who disseminated these ideas upon their return to their homeland.
