In the 15th century, the University of Krakow gained fame thanks to two faculties: astronomy, created by Stobner and astrological, founded by Martin Król of Żurawica. The faculty of astrology was the first of its kind in Europe. Future adepts of the science of stars could learn not only from renowned ancient and medieval scholars, such as Aristotle, Claudius Ptolemy or John Regiomontanus, but also expanded the acquired knowledge by studying at the university and from textbooks by local Krakow masters. These textbooks were usually entitled Introductorium astronomie, Introductorium astrologie or Usus almanach and were a kind of script that systematized the foundations of astronomical and astrological knowledge. Their characteristics are shown by two preserved texts written in Krakow by eminent scholars from Silesia, John from Głogów and Michael Falkener from Wrocław; both bear the title of Introductorium astronomy. The author shows the contribution of these scholars and their works to the development of astrology and astronomy at the University of Krakow at the turn of the 16th and 16th centuries.