In recent years, the study of this problem has received considerable attention in both Ukrainian and Polish historiography, which is connected, on the one hand, with the deportation of Ukrainians from Poland and Poles from Ukraine, and, on the other, with the loss of confessional presence, including property., these two denominations in Western Ukraine in 1944-1946. Both the first and the second are related to the policy of the State power of the Stalin regime. The echo of these events reminded (...) itself in the late 1980s - in the first half of the 1990s - of the apogee years of interfaith confrontation in Ukraine and still echoes today, activating these 60-year-old events. Therefore, given the Ukrainian and Polish historiography of the study, it is appropriate to cover this issue in more detail. This is the relevance of our article. In this context, the author used sources already available in our time in the archives of Lviv, Ternopil, and Ivano-Frankivsk regions, which have not yet been fully explored by researchers. This made it possible to reproduce the confessional transformations of the Roman Catholic Church and the Armenian Catholic Church in a broader and more detailed way and to show the impact on this process of state power, which was the purpose of the study. (shrink)