The first half of the 1770s saw significant changes in the leadership of the Polish Church. Three dignitaries had already passed through the archbishopric of Gniezno. Mikołaj Prażmowski, who died in 1673, was succeeded by Kazimierz Florian Czartoryski, and after his untimely death in May 1674, Andrzej Olszowski became Primate of Poland. The appointment of the Archbishops of Gniezno, the highest dignitaries of the Polish Church, who served as a provisional king during the interregnum, aroused much emotion among the bishops aspiring to this important position. The appointment of the Primate always led to successive personnel changes in the Polish episcopate, whose members aspired to the most important and lucrative bishoprics. Hence the strong rivalry between bishops for the most prestigious and lucrative dioceses. There were rumours and speculation about possible appointments made by the king and then approved by the pope. Some of these became part of the literature and functioned as historical facts. Such was the case of Bishop Tomasz Leżeński, who, according to many studies, received a royal appointment to the archbishopric of Gniezno in 1674, but died the following year before receiving papal approval. Sources, however, are silent on this alleged nomination, according to which, as early as June 1674, at the behest of the newly elected King Jan III Sobieski, steps were taken in Rome to obtain the papal recommendation of Bishop Andrzej Olszowski for the archbishopric. This dignitary received the papal recommendation at the end of the year. Against the alleged nomination of Leżeński’s is not only the fact that the steps to nominate Olszowski had already been taken during his lifetime and had even been completed. Furthermore, Leżeński's nomination to the archbishopric is not proven by his epitaph in the monastery church of Wąchock, where Leżeński was abbot. This nomination could also be questioned in view of the bishop's advanced age and the fact that he had already made a will a few years earlier, thinking about the end of his days. In this context, the alleged nomination of Leżeński’s must be rejected. Archbishop Czartoryski's immediate successor was therefore Andrzej Olszowski, who, incidentally, had been promised promotion to primate by the previous king several years earlier. By appointing Olszowski as Archbishop of Gniezno, King John III carried out the will of his royal predecessor. The belief in the nomination of Leżeński to the archbishopric is probably based on a misinterpretation of the words of the author of one of the most popular herbaria, Kasper Niesielski, who, enumerating the great merits of Bishop Leżeński, believed that they predestined him for the archbishopric. Niesiecki's high assessment of Leżeński's merits, which some scholars interpreted as certain information about his nomination, has definitely entered the historical literature.