Abstract

The development of each Church is denoted by one or another landmark, most of which are well-known to all, although there are also few known or those whose influence on the evolution of the Church is not evident. The Second Vatican Council is an event that, without exaggeration, can be a determinant of the time "before" and "after", not only for the Catholic Church, where it took place. Since this Cathedral was a significant stage of qualitative development, or not the oldest continuously existing institution, the consequences of its decisions, including the consequences of the remote, are interesting to study, in particular, from the point of view of their influence on further institutionalization processes in the Church. This is an interesting field of research for many religious scholars, but in this exploration we are currently focusing on the specifics of the course of institutionalization processes in the modern Ukrainian Greek Catholic Church as a special part of the post-assembly Catholic Church, as one that inherited the advantages and problems of the Christian East, and the Christian West.