Treaty of Hadiach
According to the Treaty of Hadiach (1658), an Orthodox Ruthenian academy was to be created in Kyiv and another one in an unspecified location. The Jesuits suspected that it would be established in Lwów/Lviv on the foundations of the Orthodox Brotherhood's school, and used this as a pretext for obtaining a royal mandate that elevated their college to the status of an academy (no city could have two academies). King John II Casimir was a supporter of the Jesuits and his stance was crucial. The original royal charter was subsequently confirmed by another decree issued in Częstochowa on February 5, 1661.